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Bhown AS, Bennett JC, Cornelius TW, Hunter E. Exclusive Use of High Pressure Liquid Chromatography for the Determination of the Complete Amino Acid Sequence of the 12K Fragment of Avian Sarcoma Virus Structural Protein p27. ACTA ACUST UNITED AC 2006. [DOI: 10.1080/01483918308066886] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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2
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Camici G, Manao G, Cappugi G, Modesti A, Stefani M, Ramponi G. The complete amino acid sequence of the low molecular weight cytosolic acid phosphatase. J Biol Chem 1989. [DOI: 10.1016/s0021-9258(19)81649-6] [Citation(s) in RCA: 57] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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3
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A novel cleavage product of human complement component C3 with structural and functional properties of cobra venom factor. J Biol Chem 1988. [DOI: 10.1016/s0021-9258(18)37808-6] [Citation(s) in RCA: 42] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
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4
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Ramesh N, Sugumaran M, Mole JE. Purification and characterization of two trypsin inhibitors from the hemolymph of Manduca sexta larvae. J Biol Chem 1988. [DOI: 10.1016/s0021-9258(18)37989-4] [Citation(s) in RCA: 59] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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5
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Arai K, Tominaga H, Yokote Y, Narise S. The complete amino-acid sequence of cytoplasmic glycerol-3-phosphate dehydrogenase from Drosophila virilis. ACTA ACUST UNITED AC 1988. [DOI: 10.1016/0167-4838(88)90003-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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6
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Volanakis JE, Macon KJ. Isolation of complement protein D from urine of patients with Fanconi's syndrome. Anal Biochem 1987; 163:242-6. [PMID: 3650024 DOI: 10.1016/0003-2697(87)90119-9] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Complement protein D is the least abundant of all complement proteins and, thus, one of the most difficult to purify. We report a new method for obtaining pure D from urine of patients with Fanconi's syndrome. The method is simple and allows the purification of milligram amounts of D within a few days. It involves three chromatographic steps using Bio-Rex 70, hydroxylapatite HPLC, and reverse-phase HPLC. Protein D purified by this method is suitable for both functional and structural studies.
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7
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Malik NA, Anantharamaiah GM, Gawish A, Cheung HC. Structural and biological studies on synthetic peptide analogues of a low-affinity calcium-binding site of skeletal troponin C. BIOCHIMICA ET BIOPHYSICA ACTA 1987; 911:221-30. [PMID: 3801495 DOI: 10.1016/0167-4838(87)90011-2] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
We have synthesized four oligopeptides that are structural analogues of a low-affinity Ca2+-specific binding site (site II) of rabbit skeletal troponin C. One analogue (peptide 3) was a dodecapeptide with a sequence corresponding to the 12-residue Ca2+-binding loop (residues 63-74 in troponin C), two (peptides 4 and 5) were 23-residue in length, corresponding to residues 52-74 of the protein, and the fourth (peptide 6) was a 25-residue peptide corresponding to residues 50-74. All four peptides had one amino acid substitution within the 12-residue binding loop in which phenylalanine at position 10 was replaced by tyrosine to provide a marker for spectroscopic studies. In addition, peptides 3 and 4 each had a second substitution within the binding loop where glycine at position 6 was replaced by alanine. The second substitution was motivated by the conservation of glycine at the position in the Ca2+-binding loops of all four Ca2+-binding sites in troponin C. The peptides were characterized by their intrinsic fluorescence, ability to enhance the emission of bound Tb3+, affinity for Ca2+ and Tb3+, and circular dichroism. The affinity for Ca2+ was in the range 10-10(2) M-1, and the affinity for Tb3+ was in the range 10(4)-10(5) M-1. The binding constants of the longer peptides were several-fold larger than that of the dodecapeptide. With peptides 4 and 5, substitution of glycine by alanine at position 6 within the 12-residue loop decreased the affinity for Ca2+ by a factor of four, but had little effect on the affinity for Tb3+. However, the mean residue ellipticity of peptide 4 was substantially higher than that of peptide 5. Since peptide 4 differs from peptide 5 only in the substitution of glycine at position 6 in the loop segment, the conservation of glycine at that position may serve a role in providing a suitable secondary structure of the binding sites for interaction with troponin I. Peptides 4 and 6, when present in a large excess, mimic troponin C in regulating fully reconstituted actomyosin ATPase by showing partial calcium sensitivity and activation of the ATPase. Since these peptides are the smallest peptides containing the Ca2+-binding loop of site II, their biological activity suggests that a Ca2+-dependent binding site of troponin C for troponin I could be as short as the segment comprising residues 52-62.
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8
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Nakano K, Tashiro Y, Kikumoto Y, Tagaya M, Fukui T. Amino acid sequence of cyanogen bromide fragments of potato phosphorylase. J Biol Chem 1986. [DOI: 10.1016/s0021-9258(19)83899-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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9
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Pinzauti G, Giachetti E, Camici G, Manao G, Cappugi G, Vanni P. An isocitrate lyase of higher plants: analysis and comparison of some molecular properties. Arch Biochem Biophys 1986; 244:85-93. [PMID: 3947071 DOI: 10.1016/0003-9861(86)90096-2] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
A new purification procedure for isocitrate lyase from Pinus pinea is reported. The final preparation shows charge homogeneity and a purity degree higher than 95%. It is possible to remove catalase completely by exploiting the high hydrophobicity of isocitrate lyase. The enzyme has a Mr of 264,000 and is likely composed of four subunits, each with a Mr of 66,000. The binding of radioactively labeled oxalate revealed four catalytic sites per oligomer. These data suggest that isocitrate lyase subunits are similar, if not identical. The Michaelis constant for isocitrate is equal to 33 microM; molecular activity is about 2670 mol X min-1 X mol of enzyme-1. The amino acid composition of the enzyme was also determined. Isocitrate lyase appears resistant to proteolysis by carboxypeptidase A. Hydrazinolysis, Edman degradation, and dansyl chloride treatment indicate that both carboxy and amino terminals are probably inaccessible or blocked.
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10
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Baiget M, Gomez Pereira C, Jue DL, Johnson MH, McGuffey JE, Moo-Penn WF. A case of hemoglobin Indianapolis [beta 112(G14) Cys----Arg] in an individual from Cordoba, Spain. Hemoglobin 1986; 10:483-94. [PMID: 3781865 DOI: 10.3109/03630268609014133] [Citation(s) in RCA: 26] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Hemoglobin Indianapolis was first described by Adams et al (1,2) as a very unstable variant with a phenotype similar to severe beta-thalassemia. We have also characterized this variant, but there are several differences in the clinical expression of the variant described in our report and those described in the original case. We found Hb Indianapolis to be unstable, but not to the extent that it could not be detected by routine testing. The four family members heterozygous for the variant were not anemic, showed normal hematologic values, and did not exhibit any severe clinical disadvantages, although there was slight reticulocytosis. The variant could not be resolved from Hb A on cellulose acetate (pH 8.4), but isoelectric focusing showed a double band in the region of Hb A that is probably the variant and Hb A. However, the variant chain was clearly evident by globin chain analyses in acid and alkaline buffers. The condition of additional blood samples did not allow us to determine the oxygen dissociation properties of the variant or the rates of globin chain synthesis.
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11
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Cleavage of bovine skin type III collagen by proteolytic enzymes. Relative resistance of the fibrillar form. J Biol Chem 1985. [DOI: 10.1016/s0021-9258(17)36252-x] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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12
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Kwiatkowski DJ, Janmey PA, Mole JE, Yin HL. Isolation and properties of two actin-binding domains in gelsolin. J Biol Chem 1985. [DOI: 10.1016/s0021-9258(18)95726-1] [Citation(s) in RCA: 47] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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13
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Bhown AS, Bennett JC. A modified system for thiazolinone conversion to thiohydantoin derivatives and their separation by high-pressure liquid chromatography. Anal Biochem 1985; 150:457-62. [PMID: 4091269 DOI: 10.1016/0003-2697(85)90535-4] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
An improved and very simple procedure for thiazolinone conversion to thiohydantoin derivatives and their separation by reverse-phase high-pressure liquid chromatography is described. Trifluoroacetic acid (10%) in ethyl acetate has been employed as a conversion reagent to circumvent the deamidation of acid amides and methylation of acidic amino acids, with a concomitant increase in the detection limits of these residues. Additionally, a very simple procedure has been developed for the separation of phenylthiohydantoin (PTH) derivatives of amino acids. The system takes advantage of the computer-controlled precise mixing of the solvents A and B to achieve accurate pH and thus avoid the necessity of pH adjustment of a buffer. The procedure is simple and highly reproducible, and separates all the 20 known PTH amino acids. The efficiency of the method has been examined on synthetic and natural proteins/peptides, in manual and autoconversion systems, over a period of more than 18 months.
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14
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Heck LW, Darby WL, Hunter FA, Bhown A, Miller EJ, Bennett JC. Isolation, characterization, and amino-terminal amino acid sequence analysis of human neutrophil elastase from normal donors. Anal Biochem 1985; 149:153-62. [PMID: 3852649 DOI: 10.1016/0003-2697(85)90488-9] [Citation(s) in RCA: 32] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Human neutrophil elastase from normal donors has been purified using an isolation procedure which included sequential sodium chloride extraction, Aprotinin-Sepharose affinity chromatography, CM-cellulose ion-exchange chromatography, and AcA44 gel filtration chromatography. The inclusion of this last purification step was crucial for separating inactive lower molecular weight species from the active forms of neutrophil elastase and resulted in a higher specific activity of the final preparation. Sodium dodecyl sulfate-polyacrylamide gradient gel electrophoresis of the reduced purified protein demonstrated three polypeptides of Mr 31,000, 28,000, and 27,500. Four polypeptides were resolved on acid gel electrophoresis; each of the four possessed amidolytic activity. Furthermore, peptide analysis of Staphylococcus aureus V8 protease digests indicated that these polypeptides are structurally related to each other and represent microheterogeneity of the purified protein. The apparent isoelectric points of these four forms as determined by two-dimensional electrophoresis range from 6.1 to 6.7. By utilizing microsequencing techniques, the first 40 residues of neutrophil elastase have been determined and compared with the reported sequence of elastase isolated from leukemic myeloid cells. In addition, a high degree of homology was found within the amino-terminal regions of neutrophil elastase and the serine proteinases porcine elastase, bovine chymotrypsin, human factor D, and the beta chain of plasmin.
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15
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Henzel WJ, Mole JE, Mulligan K, Lipke H. Sarcophagid larval proteins: partial sequence homologies among three cuticle proteins and related structures of drosophilids. J Mol Evol 1985; 22:39-45. [PMID: 3932663 DOI: 10.1007/bf02105803] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Three structural proteins from the larval cuticle of Sarcophaga bullata have been sequenced at the amino terminus for 30-40 residues. We observed a high degree of homology with related proteins of Drosophila melanogaster, based on the previous findings of M. Snyder, J. Hirsh, and N. Davidson [(1981) Cell 25:165-177]. S. bullata protein SC1 had 65% homology with Drosophila isolate CP1, and SC6 showed 49% homology with CPX and 54% with CP2a. The three sarcophagid polypeptides also resembled each other with respect to mapped products of tryptic cleavage. The sites of posttranslational arylation required for puparium formation, namely histidyl and lysyl residues, were asymmetrically distributed in the sarcophagid samples. In SC1 the bulk of the loci of putative crosslinks lay beyond the 43-residue fragment. In SC6 half the histidines fell within the first 25% of the primary chain.
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16
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Massagué J, Like B. Cellular receptors for type beta transforming growth factor. Ligand binding and affinity labeling in human and rodent cell lines. J Biol Chem 1985. [DOI: 10.1016/s0021-9258(18)89408-x] [Citation(s) in RCA: 242] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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17
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Han KK, Belaiche D, Moreau O, Briand G. Current developments in stepwise edman degradation of peptides and proteins. ACTA ACUST UNITED AC 1985. [DOI: 10.1016/0020-711x(85)90138-7] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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18
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Bhown AS, Bennett JC. Identification of phenylthiohydantoin derivatives of substituted amino acids encountered during amino acid sequence analysis by high-performance liquid chromatography. J Chromatogr A 1984; 314:467-70. [PMID: 6526891 DOI: 10.1016/s0021-9673(01)97763-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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19
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Cole KD, York RG, Kistler WS. The amino acid sequence of boar H1t, a testis-specific H1 histone variant. J Biol Chem 1984. [DOI: 10.1016/s0021-9258(18)89801-5] [Citation(s) in RCA: 33] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
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20
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Complete high-performance liquid chromatographic separation of phenylthiohydantoin- and 4-N,N-dimethylaminoazobenzene 4′-thiohydantoin-amino acids on an ultrasphere ods column with the same buffer system. J Chromatogr A 1984. [DOI: 10.1016/s0021-9673(01)89030-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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21
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Arai KM, Muto N, Tani S, Akahane K. The N-terminal sequence of rat pepsinogen. BIOCHIMICA ET BIOPHYSICA ACTA 1984; 788:256-61. [PMID: 6743670 DOI: 10.1016/0167-4838(84)90269-3] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
The amino-acid sequence of 96 residues in the N-terminal region of rat pepsinogen I was determined and the first 46 residues were found to constitute the activation peptide segment. There was high degree of homology between the activation segments of rat pepsinogen and some pepsinogens A (pig, cow, Japanese monkey and human). However, the number of residues substituted between rat and the other pepsinogens were considerably larger than those among pepsinogens A. In the N-terminal 24 residues of active pepsin, homology (88%) between rat pepsin and human gastricsin was higher than that (50%) between rat pepsin and pepsin A from human or pig. This strongly suggests that rat pepsin should be classified as pepsin C.
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22
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Niemann MA, Bhown AS, Bennett JC, Volanakis JE. Amino acid sequence of human D of the alternative complement pathway. Biochemistry 1984; 23:2482-6. [PMID: 6383466 DOI: 10.1021/bi00306a025] [Citation(s) in RCA: 36] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
The primary structure of human D, the serine protease activating the C3 convertase of the alternative complement pathway, has been deduced by sequencing peptides derived from various chemical (CNBr and o-iodosobenzoic acid) and enzymatic (trypsin, lysine protease, Staphylococcus aureus V8 protease, and chymotrypsin) cleavages. Carboxypeptidase A was also used to confirm the COOH-terminal sequence. The peptides were purified by high-pressure liquid chromatography. The proposed sequence of human D contains 222 amino acids and has a calculated molecular weight of 23 748. It exhibits a high degree of homology with other serine proteases, especially around the NH2-terminus as well as the three residues corresponding to the active-site His-57, Asp-102, and Ser-195 (chymotrypsinogen numbering). This sequence homology is highest (40%) with plasmin, intermediate (35%) with pancreatic serine proteases, such as elastase, trypsin, chymotrypsin, and kallikrein, and least (30%) with the serum enzymes thrombin and factor X. D, however, exhibits only minimal amino acid homology with the other sequenced complement serine proteases, Clr (25%) and Bb (20%). The substitution of a basic lysine for a neutral amino acid three residues NH2-terminal to the active-site serine as well as a small serine residue for a bulky aromatic amino acid at position 215 (chymotrypsinogen numbering) in the binding pocket may be important in determining the exquisite substrate specificity of D. The presence of His-40 which interacts with Asp-194 (chymotrypsinogen numbering) to stabilize other serine protease zymogens [Freer, S. T., Kraut, J., Robertus, J. D., Wright, H. T., & Xuong, N. H. (1970) Biochemistry 9, 1997] argues in favor of such a D precursor molecule.
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23
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Joyner SS, Fling ME, Stone D, Baccanari DP. Characterization of an R-plasmid dihydrofolate reductase with a monomeric structure. J Biol Chem 1984. [DOI: 10.1016/s0021-9258(18)91094-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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24
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Begg GS, Leslie BH, Morgan FJ. Purification of quadrol for microsequencing in the spinning-cup sequenator. Anal Biochem 1984; 138:30-3. [PMID: 6731850 DOI: 10.1016/0003-2697(84)90764-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Treatment of Quadrol buffer with isothiocyanatophenylthiocarbamylaminoethylaminopropyl glass (DITC glass) substantially reduces the impurities observed when this buffer is used with the spinning cup sequenator. Use of DITC glass-treated Quadrol buffer permits identification of PTH-amino acids from protein degradations down to 100 pmol.
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25
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Yin HL, Kwiatkowski DJ, Mole JE, Cole FS. Structure and biosynthesis of cytoplasmic and secreted variants of gelsolin. J Biol Chem 1984. [DOI: 10.1016/s0021-9258(17)42985-1] [Citation(s) in RCA: 71] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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26
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Bhown AS, Bennett JC. Use of mini-octadecylsilane ultrasphere column in high-pressure liquid chromatography for protein structural studies. Anal Biochem 1984; 137:256-60. [PMID: 6731804 DOI: 10.1016/0003-2697(84)90379-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Using a single mini-octadecylsilane (ODS) 5-micron ultrasphere column (0.46 X 4.5 cm) and linear gradients of different solvents, all the aspects of protein structural analysis have been defined. The effectiveness of the system has been evaluated by separating the alpha and beta chains of hemoglobin and their tryptic peptides, then performing amino acid analysis and, finally, identifying the phenylthiohydantoin derivatives of amino acids.
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27
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Epidermal growth factor-like transforming growth factor. I. Isolation, chemical characterization, and potentiation by other transforming factors from feline sarcoma virus-transformed rat cells. J Biol Chem 1983. [DOI: 10.1016/s0021-9258(17)43958-5] [Citation(s) in RCA: 123] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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28
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Moo-Penn WF, Baine RM, Jue DL, Johnson MH, McGuffey JE, Benson JM. Hemoglobin Evanston: alpha 14(A12) Trp leads to Arg. A variant hemoglobin associated with alpha-thalassemia-2. BIOCHIMICA ET BIOPHYSICA ACTA 1983; 747:65-70. [PMID: 6882779 DOI: 10.1016/0167-4838(83)90122-x] [Citation(s) in RCA: 26] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Hb Evanston (alpha 14 Trp leads to Arg) was detected on cellulose acetate at pH 8.4 as a band with an electrophoretic mobility similar to that of Hb S. In addition, a band migrating cathodic to Hb A2 suggested the presence of a variant Hb A2 with a substitution in the alpha-chain, a fact that was later confirmed by structural analysis. An unusual feature of Hb Evanston is its low percentage; less than 10% occurs in the hemolysate. Studies indicate that the variant is not unstable, but there appears to be a defect in globin-chain synthesis. Gene mapping also shows that it is associated with the alpha-thalassemia-2 gene. The variant has high oxygen affinity with normal cooperativity and a normal Bohr effect. The combination of Hb Evanston with alpha-thalassemia-2 produced anemia in this black family.
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29
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Butler WT, Bhown M, DiMuzio MT, Cothran WC, Linde A. Multiple forms of rat dentin phosphoproteins. Arch Biochem Biophys 1983; 225:178-86. [PMID: 6614917 DOI: 10.1016/0003-9861(83)90021-8] [Citation(s) in RCA: 100] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Previous studies have shown that the phosphoprotein from rat dentin is heterogenous and can be partially separated into two fractions by ion-exchange chromatography. These proteins were further characterized by polyacrylamide gel electrophoresis, gel chromatography, and amino acid and phosphate analysis, after chromatographic separations on ion-exchange columns. On 5-15% gradient gels, the phosphoproteins extracted from rat dentin and precipitated by CaCl2 gave three Alcian blue-staining bands with apparent molecular weights in the 90-95,000 range. The two slower-moving bands corresponded to highly phosphorylated proteins (HP) that had phosphoserine contents of greater than 400 residues per thousand and contained little or no valine, leucine, phenylalanine, or arginine. The faster-moving band corresponded to a moderately phosphorylated protein that contained about 250 residues per thousand of phosphoserine and greater quantities of glutamic acid, proline, and several other amino acids than HP. The nature of the phosphoproteins in HP was further studied after total removal of the phosphate with an insoluble form of bovine intestinal alkaline phosphatase. The dephosphorylated product (dP-HP) gave a single major band on gel electrophoresis but showed evidence for two closely related NH2-terminal sequences, Asp-Asp-Asp-Asn and Asp-Asp-Pro-Asn. The dephosphorylated material was separated into two components (dP-HP1 and dP-HP2) by chromatography on QAE-Sephadex A-25. The amino acid compositions of the two components showed that they differed in their primary structures. This conclusion was verified by the finding of the proline-containing sequence in dP-HP2. In addition to these two groups of phosphoproteins, a third class, LP, contains low levels of phosphoserine and high amounts of glutamic acid (W.T. Butler, M. Bhown, M.T. DiMuzio, and A. Linde, (1981) Coll. Res. 1, 187-199).
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30
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Bhown AS, Cornelius TW, Volanakis JE, Bennett JC. A comparison of fluorescamine and o-phthaldialdehyde as effective blocking reagents in protein sequence analyses by the Beckman sequencer. Anal Biochem 1983; 131:337-40. [PMID: 6614468 DOI: 10.1016/0003-2697(83)90179-3] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Use of o-phthaldialdehyde to chemically reduce the newly generated amino termini responsible for the progressively increasing background during an extended amino acid sequence analysis in a liquid phase sequencer has been described. The results have been compared with Fluram blocking using apomyoglobin and rabbit C-reactive protein as standard and unknown samples, respectively.
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31
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Fincham AG, Belcourt AB, Termine JD, Butler WT, Cothran WC. Amelogenins. Sequence homologies in enamel-matrix proteins from three mammalian species. Biochem J 1983; 211:149-54. [PMID: 6870818 PMCID: PMC1154338 DOI: 10.1042/bj2110149] [Citation(s) in RCA: 101] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Partial amino acid sequences for selected amelogenin polypeptides isolated from the developing enamel of cow, pig and human foetuses are reported. It was found that there was an identity of sequence for the initial 28 residues of the polypeptides analysed, irrespective of their origin or size. A tyrosine-rich polypeptide was shown to be the N-terminal fragment of the principal higher-molecular-weight amelogenins, although a leucine-rich polypeptide of similar size was not identified in any other amelogenin structure. The findings demonstrate a striking degree of sequence conservation for the amelogenin proteins of the extracellular enamel matrix and support the concept of a discrete fragmentation of an initial 30 000 Da amelogenin molecule during the mineralization of the enamel.
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33
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Lai PH, Pan YC, Gleisner JM, Peterson DL, Williams KR, Blakley RL. Structure of dihydrofolate reductase: primary sequence of the bovine liver enzyme. Biochemistry 1982; 21:3284-94. [PMID: 7115669 DOI: 10.1021/bi00257a006] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
The primary structure of dihydrofolate reductase from bovine liver has been established by Edman degradation of the intact carboxymethylated protein and of peptides obtained from the protein by the action of cyanogen bromide, trypsin, and the protease from Staphylococcus aureus, respectively. Since separation of some of the peptide mixtures by classical methods proved impossible, new systems were developed for the use of high-performance liquid chromatography to separate such mixtures. Some of the cleavage procedures used to obtain peptides gave atypical results at certain peptide bonds. The results are discussed in terms of the residues involved in these unexpectedly resistant or sensitive bonds. The sequence of the bovine liver enzyme is compared with those published for the enzyme from other sources, and known or probable functions of invariant residues are described. Sequences of vertebrate and bacterial reductases are compared and contrasted, and a possible role is considered for the residues which are invariant in bacterial reductases, but different in vertebrate reductases, in determining the selective inhibitory action of trimethoprim on bacterial reductases.
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Anderson JK, Mole JE. Adaptation of reverse-phase high-performance liquid chromatography for the isolation and sequence analysis of peptides from plasma amyloid P-component. Anal Biochem 1982; 123:413-21. [PMID: 7125215 DOI: 10.1016/0003-2697(82)90466-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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Linde A, Bhown M, Cothran WC, Höglund A, Butler WT. Evidence for several gamma-carboxyglutamic acid-containing proteins in dentin. BIOCHIMICA ET BIOPHYSICA ACTA 1982; 704:235-9. [PMID: 7104368 DOI: 10.1016/0167-4838(82)90151-0] [Citation(s) in RCA: 46] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
With anion-exchange chromatography, the gamma-carboxyglutamic acid (Gla)-containing proteins of rat dentin were separated into four closely related fractions (gamma 1-gamma 4). Edman degradation of gamma 2 gave two NH2-terminal sequences with a minor sequence beginning five residues shorter than the major one. Gel electrophoresis of gamma 2 yielded one major and one minor protein band. Fraction gamma 3 gave one band on gel electrophoresis and a single NH2-terminal sequence. The composition of gamma 4 suggested that, compared to gamma 2 and gamma 3, a portion of the COOH-terminal was missing. Thus some of the heterogeneity of rat dentin Gla-containing proteins can be explained by shortened ends.
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Anderson JK, Mole JE. Large scale isolation and partial primary structure of human plasma amyloid P-component. Ann N Y Acad Sci 1982; 389:216-34. [PMID: 7046576 DOI: 10.1111/j.1749-6632.1982.tb22139.x] [Citation(s) in RCA: 39] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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Fincham AG, Belcourt AB, Termine JD, Butler WT, Cothran WC. Dental enamel matrix: sequences of two amelogenin polypeptides. Biosci Rep 1981; 1:771-8. [PMID: 7306685 DOI: 10.1007/bf01114799] [Citation(s) in RCA: 98] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
The amino acid sequences of a leucine-rich amelogenin polypeptide (LRAP) and a tyrosine-rich amelogenin polypeptide (TRAP), isolated from foetal bovine enamel matrix, were determined. Both LRAP and TRAP occurred in two forms; in each case, one of the molecular species appeared to be shortened at the COOH terminus by 2 and 4 residues, respectively. A striking finding was that LRAP and TRAP had identical sequences for the first 33 residues but were almost completely different for the remaining 12 amino acids.
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Herrler G, Nagele A, Meier-Ewert H, Bhown AS, Compans RW. Isolation and structural analysis of influenza C virion glycoproteins. Virology 1981; 113:439-51. [PMID: 7269251 DOI: 10.1016/0042-6822(81)90173-2] [Citation(s) in RCA: 60] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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39
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Bhown AS, Bennett JC, Morgan PH, Mole JE. Use of fluorescamine as an effective blocking reagent to reduce the background in protein sequence analyses by the Beckman automated sequencer. Anal Biochem 1981; 112:158-62. [PMID: 7258621 DOI: 10.1016/0003-2697(81)90274-8] [Citation(s) in RCA: 32] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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