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Ríos A, Ruiz-Pardo J, Balaguer-Román A, Puñal JA, Moreno P, Mercader E, Ferrero E, Morlán MA, Martín J, Durán M, Bravo JM, Casanova D, Salvador-Egea MP, Torregrosa NM, Exposito-Rodríguez A, Martínez-Fernández G, Carrión AM, Vidal O, Herrera F, Ruiz-Merino G, Rodríguez JM. Is unicentric familial papillary thyroid microcarcinoma different from multicentric? Endocrine 2023; 82:613-621. [PMID: 37490266 DOI: 10.1007/s12020-023-03455-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/22/2023] [Accepted: 07/13/2023] [Indexed: 07/26/2023]
Abstract
BACKGROUND Familial papillary thyroid microcarcinoma (FPTMC) appears to be more aggressive than sporadic papillary thyroid microcarcinoma (SPTMC). However, there are authors who indicate that unicentric FPTMC has a similar prognosis to SPTMC. The objective is to analyze whether unicentric FPTMC has a better prognosis than multicentric FPTMC. DESIGN AND METHODS Type of study: National multicenter longitudinal analytical observational study. STUDY POPULATION Patients with FPTMC. STUDY GROUPS Two groups were compared: Group A (unicentric FPTMC) vs. Group B (multicentric FPTMC). STUDY VARIABLES It is analyzed whether between the groups there are: a) differentiating characteristics; and b) prognostic differences. STATISTICAL ANALYSIS Cox regression analysis and survival analysis. RESULTS Ninety-four patients were included, 44% (n = 41) with unicentric FPTMC and 56% (n = 53) with multicentric FPTMC. No differences were observed between the groups according to socio-familial, clinical or histological variables. In the group B a more aggressive treatment was performed, with higher frequency of total thyroidectomy (99 vs. 78%; p = 0.003), lymph node dissection (41 vs. 15%; p = 0.005) and therapy with radioactive iodine (96 vs. 73%; p = 0.002). Tumor stage was similar in both groups (p = 0.237), with a higher number of T3 cases in the group B (24 vs. 5%; p = 0.009). After a mean follow-up of 90 ± 68.95 months, the oncological results were similar, with a similar disease persistence rate (9 vs. 5%; p = 0.337), disease recurrence rate (21 vs. 8%; p = 0.159) and disease-free survival (p = 0.075). CONCLUSIONS Unicentric FPTMC should not be considered as a SPTMC due to its prognosis is similar to multicentric FPTMC.
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Affiliation(s)
- A Ríos
- Unidad de Cirugía Endocrina. Servicio de Cirugía General y de Aparato Digestivo. Instituto Murciano de Investigación Bio-Sanitaria (IMIB-Arrixaca). Hospital Clínico Universitario Virgen de la Arrixaca, Servicio Murciano de Salud, Murcia, Spain.
- Departamento de Cirugía, Pediatría y Obstetricia, y Ginecología, Universidad de Murcia, Murcia, Spain.
| | - J Ruiz-Pardo
- Servicio de Cirugía General y del Aparato Digestivo, Hospital Universitario Torrecardenas, Almería, Spain
| | - A Balaguer-Román
- Unidad de Cirugía Endocrina. Servicio de Cirugía General y de Aparato Digestivo. Instituto Murciano de Investigación Bio-Sanitaria (IMIB-Arrixaca). Hospital Clínico Universitario Virgen de la Arrixaca, Servicio Murciano de Salud, Murcia, Spain
- Departamento de Cirugía, Pediatría y Obstetricia, y Ginecología, Universidad de Murcia, Murcia, Spain
| | - J A Puñal
- Servicio de Cirugía General y Aparato Digestivo. C.H.U, Santiago de Compostela, Spain
| | - P Moreno
- Cirugía Endocrina, Hospital Universitario de Bellvitge. L´Hospitalet de Llobregat, Barcelona, Spain
| | - E Mercader
- Sección de Cirugía Endocrino-Metabólica, Hospital General Universitario Gregorio Marañón, Madrid, Spain
| | - E Ferrero
- Servicio de Cirugía General, Aparato Digestivo y Trasplante de Órganos Abdominales, Hospital Universitario 12 de Octubre, Madrid, Spain
| | - M A Morlán
- Servicio de Cirugía General y del Aparato Digestivo, Hospital Virgen de la Salud, Toledo, Spain
| | - J Martín
- Servicio de Cirugía General y Aparato digestivo, Hospital Universitario Severo Ochoa. Leganés, Madrid, Spain
| | - M Durán
- Servicio de Cirugía General y del Aparato Digestivo, Hospital Universitario Rey Juan Carlos. Móstoles, Madrid, Spain
- Facultad de Ciencias de la Salud, Universidad Rey Juan Carlos. Alcorcón, Madrid, Spain
| | - J M Bravo
- Servicio de Cirugía General y del Aparato Digestivo, Hospital de la Princesa, Madrid, Spain
| | - D Casanova
- Servicio de Cirugía General y del Aparato Digestivo, Hospital Universitario Marqués de Valdecilla, Santander, Spain
| | - M P Salvador-Egea
- Servicio de Cirugía General y Digestiva, Complejo Hospitalario de Pamplona. Pamplona, Navarra, Spain
| | - N M Torregrosa
- Servicio de Cirugía General y del Aparato Digestivo, Hospital de Santa Lucia, Cartagena, Murcia, España
| | - A Exposito-Rodríguez
- Servicio de Cirugía General y del Aparato Digestivo, Hospital de Basurto, Vizcaya, España
| | - G Martínez-Fernández
- Unidad de Cirugía Endocrina, Servicio de Cirugía General (Hospital Universitario de Cruces), Barakaldo (Bizkaia), Spain
| | - A M Carrión
- Servicio de Cirugía, Hospital General Universitario de Alicante, Alicante, Spain
| | - O Vidal
- Cirugía General y del Aparato Digestivo, Hospital Universitario de Burgos, Burgos, Spain
| | - F Herrera
- Servicio de Cirugía General, Hospital General Básico Santa Ana, Motril (Granada), Spain
| | - G Ruiz-Merino
- FFIS, Fundación para la Formación e Investigación Sanitarias de la Región de Murcia, Murcia, España
| | - J M Rodríguez
- Unidad de Cirugía Endocrina. Servicio de Cirugía General y de Aparato Digestivo. Instituto Murciano de Investigación Bio-Sanitaria (IMIB-Arrixaca). Hospital Clínico Universitario Virgen de la Arrixaca, Servicio Murciano de Salud, Murcia, Spain
- Departamento de Cirugía, Pediatría y Obstetricia, y Ginecología, Universidad de Murcia, Murcia, Spain
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2
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Ríos A, Rodríguez MA, Puñal JA, Moreno P, Mercader E, Ferrero E, Ruiz-Pardo J, Morlán MA, Martín J, Durán-Poveda M, Bravo JM, Casanova D, Egea MPS, Torregrosa NM, Exposito-Rodríguez A, Martínez-Fernández G, Carrión AM, Vidal O, Herrera F, Ruiz-Merino G, Rodríguez JM. Biological behavior of familial papillary thyroid microcarcinoma: Spanish multicenter study. Langenbecks Arch Surg 2022; 407:3631-3642. [PMID: 36251077 DOI: 10.1007/s00423-022-02704-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2021] [Accepted: 10/05/2022] [Indexed: 10/24/2022]
Abstract
PURPOSE Familial papillary thyroid microcarcinoma (FPTMC) can present a more aggressive behavior than the sporadic microcarcinoma. However, few studies have analyzed this situation. The objective is to analyze the recurrence rate of FPTMC and the prognostic factors which determine that recurrence in Spain. METHODS Spanish multicenter longitudinal analytical observational study was conducted. Patients with FPTMC received treatment with curative intent and presented cure criteria 6 months after treatment. Recurrence rate and disease-free survival (DFS) were analyzed. Two groups were analyzed: group A (no tumor recurrence) vs. group B (tumor recurrence). RESULTS Ninety-four patients were analyzed. During a mean follow-up of 73.3 ± 59.3 months, 13 recurrences of FPTMC (13.83%) were detected and mean DFS was 207.9 ± 11.5 months. There were multifocality in 56%, bilateral thyroid involvement in 30%, and vascular invasion in 7.5%; that is to say, they are tumors with histological factors of poor prognosis in a high percentage of cases. The main risk factors for recurrence obtained in the multivariate analysis were the tumor size (OR: 2.574, 95% CI 1.210-5.473; p = 0.014) and the assessment of the risk of recurrence of the American Thyroid Association (ATA), both intermediate risk versus low risk (OR: 125, 95% CI 10.638-1000; p < 0.001) and high risk versus low risk (OR: 45.454, 95% CI 5.405-333.333; p < 0.001). CONCLUSION FPTMC has a recurrence rate higher than sporadic cases. Poor prognosis is mainly associated with the tumor size and the risk of recurrence of the ATA.
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Affiliation(s)
- A Ríos
- Unidad de Cirugía Endocrina, Servicio de Cirugía General Y de Aparato Digestivo, Instituto Murciano de Investigación Bio-Sanitaria (IMIB-Arrixaca), Hospital Clínico Universitario Virgen de La Arrixaca, Servicio Murciano de Salud, Murcia, Spain. .,Departamento de Cirugía, Pediatría Obstetricia, Y Ginecología, Universidad de Murcia, Murcia, Spain.
| | - M A Rodríguez
- Departamento de Cirugía, Pediatría Obstetricia, Y Ginecología, Universidad de Murcia, Murcia, Spain
| | - J A Puñal
- Servicio de Cirugía General Y Aparato Digestivo, C.H.U, Santiago de Compostela, Spain
| | - P Moreno
- Cirugía Endocrina, Hospital Universitario de Bellvitge, L´Hospitalet de Llobregat, Barcelona, Spain
| | - E Mercader
- Sección de Cirugía Endocrino-Metabólica, Hospital General Universitario Gregorio Marañón, Madrid, Spain
| | - E Ferrero
- Servicio de Cirugía General, Aparato Digestivo Y Trasplante de Órganos Abdominales, Hospital Universitario, 12 de Octubre, Madrid, Spain
| | - J Ruiz-Pardo
- Servicio de Cirugía General Y del Aparato Digestivo, Hospital Universitario Torrecárdenas, Almeria, Spain
| | - M A Morlán
- Servicio de Cirugía General Y del Aparato Digestivo, Hospital Virgen de La Salud, Toledo, Spain
| | - J Martín
- Servicio de Cirugía General Y Aparato Digestivo, Hospital Universitario Severo Ochoa, Leganés, Madrid, Spain
| | - M Durán-Poveda
- Servicio de Cirugía General Y del Aparato Digestivo, Hospital Universitario Rey Juan Carlos. Móstoles, Madrid, Spain.,Facultad de Ciencias de La Salud, Universidad Rey Juan Carlos, Alcorcón, Madrid, Spain
| | - J M Bravo
- Servicio de Cirugía General Y del Aparato Digestivo, Hospital de La Princesa, Madrid, Spain
| | - D Casanova
- Servicio de Cirugía General Y del Aparato Digestivo, Hospital Universitario Marqués de Valdecilla, Santander, Spain
| | - M P Salvador Egea
- Servicio de Cirugía General Y Digestiva, Complejo Hospitalario de Navarra, Pamplona, Spain
| | - N M Torregrosa
- Servicio de Cirugía General Y del Aparato Digestivo, Hospital de Santa Lucia, Cartagena, Murcia, Spain
| | - A Exposito-Rodríguez
- Servicio de Cirugía General Y del Aparato Digestivo, Hospital de Basurto, Bizkaia, Spain
| | - G Martínez-Fernández
- Unidad de Cirugía Endocrina, Servicio de Cirugía General (Hospital Universitario de Cruces), Barakaldo, Bizkaia, Spain
| | - A M Carrión
- Servicio de Cirugía, Hospital General Universitario de Alicante, Alicante, Spain
| | - O Vidal
- Cirugía General Y del Aparato Digestivo, Hospital Universitario de Burgos, Burgos, Spain
| | - F Herrera
- Servicio de Cirugía General, Hospital General Básico Santa Ana, Motril, Granada, Spain
| | - G Ruiz-Merino
- FFIS, Fundación Para La Formación E Investigación Sanitarias de La Región de Murcia, Murcia, Spain
| | - J M Rodríguez
- Unidad de Cirugía Endocrina, Servicio de Cirugía General Y de Aparato Digestivo, Instituto Murciano de Investigación Bio-Sanitaria (IMIB-Arrixaca), Hospital Clínico Universitario Virgen de La Arrixaca, Servicio Murciano de Salud, Murcia, Spain.,Departamento de Cirugía, Pediatría Obstetricia, Y Ginecología, Universidad de Murcia, Murcia, Spain
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Salido S, Gómez-Ramírez J, Bravo JM, Martín-Pérez E, Fernández-Díaz G, Múñoz de Nova JL, Auza J, Larrañaga E. Parathyroid adenoma in third pharyngeal pouch cyst as a rare case of primary hyperparathyroidism. Ann R Coll Surg Engl 2014; 96:e8-10. [PMID: 25245714 DOI: 10.1308/003588414x13946184900804] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
The primitive thymus and inferior parathyroid derive from the third branchial cleft. During embryonic development, these structures descend, reaching their final localisation. Third branchial cleft anomalies present usually as a fistula, abscess or cyst. However, there are no reports on parathyroid adenomas in the literature other than as a morphological possibility. We describe the case of a 47-year-old man, who had been diagnosed with arterial hypertension and who presented with a cervical mass at the edge of the lower third of the sternocleidomastoid muscle. On ultrasonography, the mass had a cystic walled appearance. Laboratory analysis only revealed an intact parathyroid hormone level of 140.5 pg/ml. Sestamibi imaging showed a probable parathyroid adenoma in the anterior mediastinum. During surgery, a tract running from beyond the superior thyroid pedicle to the superior mediastinum was dissected and removed. In the inferior end of the tract, a brown mass was visible. Pathological examination revealed a thymus cyst surrounding a parathyroid adenoma. The primal alteration was the lack of division between the thymus and inferior parathyroid gland, and the prompt prevention of their development. In the case of our patient, a parathyroid adenoma had grown by chance.
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Affiliation(s)
- S Salido
- La Princesa University Hospital, Madrid, Spain
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Gómez-Ramírez J, Tagarro D, Bravo JM, Martín-Pérez E, Larrañaga E. Preoperative parathyroid harpoon localisation: a new technique helpful in reoperative patients with persistent hyperparathyroidism. Ann R Coll Surg Engl 2013; 95:e25-6. [PMID: 23484975 PMCID: PMC4098598 DOI: 10.1308/003588413x13511609955896] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Surgery for persistent primary hyperparathyroidism remains a major challenge for surgeons and these reoperative procedures require an experienced parathyroid surgeon. The goal of reoperative surgery is to excise the abnormal parathyroid gland(s) and limit exploration to help minimise the potential complications. At least two positive and concordant localising studies should be available before reoperation because the technical difficulties in these cases make an exact localisation necessary before surgery. We describe the placement of a metallic harpoon under ultrasonography guidance as a safe, simple and inexpensive technique for localisation of the enlarged gland prior to conservative surgery.
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Affiliation(s)
- J Gómez-Ramírez
- Department of General Surgery, La Princesa University Hospital, Madrid, Spain.
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5
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Bravo JM, Perzl M, Härtner T, Kannenberg EL, Rohmer M. Novel methylated triterpenoids of the gammacerane series from the nitrogen-fixing bacterium Bradyrhizobium japonicum USDA 110. Eur J Biochem 2001; 268:1323-31. [PMID: 11231284 DOI: 10.1046/j.1432-1327.2001.01998.x] [Citation(s) in RCA: 67] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
The nitrogen-fixing, symbiotic root-nodule forming bacterium Bradyrhizobium japonicum USDA 110 contained gammacerane derivatives next to triterpenoids of the hopane series. Diploptene, diplopterol, 2 beta-methyldiplopterol, aminobacteriohopanetriol and adenosylhopane were accompanied by tetrahymanol and the corresponding novel methylated homologues 2 beta-methyltetrahymanol, 20 alpha-methyltetrahymanol, and 2 beta,20 alpha-dimethyltetrahymanol. Incorporation of [(2)H(3)]methyl-L-methionine indicated that the additional methyl groups originated from methionine, probably with S-adenosylmethionine acting as methyl donor, with retention of the three deuterium atoms. The simultaneous presence of hopane and gammacerane derivatives seems a characteristic feature of the genus Bradyrhizobium and the phylogenetically closely related Rhodopseudomonas palustris.
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Affiliation(s)
- J M Bravo
- Université Louis Pasteur/CNRS, Institut Le Bel, Strasbourg, France
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6
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Tamayo MC, Rufat M, Bravo JM, San Segundo B. Accumulation of a maize proteinase inhibitor in response to wounding and insect feeding, and characterization of its activity toward digestive proteinases of Spodoptera littoralis larvae. Planta 2000; 211:62-71. [PMID: 10923704 DOI: 10.1007/s004250000258] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
The mpi gene encodes a maize proteinase inhibitor (MPI) protein whose mRNA accumulates in response to mechanical wounding. In this study, mpi gene expression in response to different types of damage was investigated. In mechanically damaged leaves of maize (Zea mays L.), mpi mRNA accumulation was affected by the degree of damage inflicted on the leaf. Consecutive wounds resulted in higher levels of mpi transcripts. The MPI protein was expressed in Escherichia coli and purified. Polyclonal antibodies were then produced and used to study MPI accumulation in insect-wounded and mechanically wounded maize leaves. When larvae of the lepidopteran insect Spodoptera littoralis were fed on maize leaves, MPI accumulated in tissues adjacent to the wound site. The level of inhibitor accumulation was higher in leaves chewed by larvae than in leaves that had been damaged mechanically. Longer feeding periods also resulted in higher levels of MPI accumulation. Additionally, the inhibitory properties of MPI toward mammalian and insect digestive serine proteinases were determined. Contrary to the majority of the plant proteinase inhibitors described, MPI is an inhibitor of mammalian elastase that only weakly inhibits mammalian chymotrypsin. However, both elastase and chymotrypsin-like activities from the larval midgut of S. littoralis were effectively inhibited by MPI. We discuss these results with regard to the function and evolution of plant proteinase inhibitors. The availability of a plant proteinase inhibitor which is able to inhibit the two types of insect digestive proteinase, elastase and chymotrypsin, might be useful for engineering protection against lepidopteran insect pests in transgenic plants.
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Affiliation(s)
- M C Tamayo
- Departamento de Genética Molecular, Instituto de Biología Molecular de Barcelona, Centro de Investigación y Desarrollo, CSIC, Spain
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Putra SR, Disch A, Bravo JM, Rohmer M. Distribution of mevalonate and glyceraldehyde 3-phosphate/pyruvate routes for isoprenoid biosynthesis in some gram-negative bacteria and mycobacteria. FEMS Microbiol Lett 1998; 164:169-75. [PMID: 9675863 DOI: 10.1111/j.1574-6968.1998.tb13082.x] [Citation(s) in RCA: 46] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
Labeling experiments using [1-13C]acetate or [1-13C]glucose were performed with opportunistic pathogenic bacteria, with innocuous bacteria related to pathogenic species or with phytopathogenic species. The labeling pattern was determined in the isoprenic moiety of ubiquinone or menaquinone derivatives. These experiments showed that Acinetobacter, Citrobacter, Erwinia, Pseudomonas, Burkholderia, Ralstonia and Mycobacterium synthesize their isoprenoids via the mevalonate-independent glyceraldehyde 3-phosphate/pyruvate route. Enzymes of this novel bacterial metabolic route, which is apparently absent in vertebrates and man, therefore represent potential targets for a novel type of antibacterial drugs.
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Affiliation(s)
- S R Putra
- Université Louis Pasteur/CNRS, Institut Le Bel, Strasbourg, France
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Clerch B, Bravo JM, Llagostera M. Efficiency of MucAB and Escherichia coli UmuDC proteins in quinolone and UV mutagenesis in Salmonella typhimurium: effect of MucA and UmuD processing. Mutat Res 1996; 349:201-8. [PMID: 8600351 DOI: 10.1016/0027-5107(95)00179-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
The role of MucAB and Escherichia coli UmuDC proteins in mutagenesis by 4-quinolone (4-Q) compared to that in UV mutagenesis has been studied in hisG428 Salmonella typhimurium strains. A low-copy plasmid carrying mucAB genes, but not umuDC, promotes reversion of the hisG428 mutation by the 4-Q ciprofloxacin. In contrast, a umuDC plasmid mediates the reversion of hisG428 by UV, although less efficiently than a mucAB one. In addition, a unique copy of mucAB genes is enough to promote UV mutagenesis, whereas, several copies of them are required to detect ciprofloxacin mutagenesis. Therefore, the mutagenic repair of quinolone damage by MucAB proteins is not a very efficient process. The presence of an umuD'C plasmid but not a mucA'B one, slightly increases the reversion of the hisG428 mutation by ciprofloxacin and this finding is further discussed. In contrast, MucA'B are still more active than UmuD'C proteins in UV mutagenesis. These results suggest that the enhanced processing of MucA compared to UmuD would not explain all functional differences between MucAB and UmuDC proteins in the error-prone DNA repair.
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Affiliation(s)
- B Clerch
- Unitat de Microbiologia (Ciències), Department de Genètica i de Microbiologia, Universitat Autònoma de Barcelona, 08193 Bellaterra (Barcelona), Spain
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Abstract
The mutagenic events induced by ciprofloxacin, a potent antimicrobial agent, have been characterized. For this, a battery of His mutants of Salmonella typhimurium (hisG428, his G46, His C9070, and his G1775 targets) that detects the six possible transitions and transversions [Levin and Ames (1986): Environ Mutagen 8:9-28] and two additional His strains (hisC3076 and his D3052 targets) carrying frameshift mutations have been used. Our results indicate that GC-TA transversions are the major base-pair substitution induced by ciprofloxacin and that GC-At transitions are also produced, but to a lesser degree. However, we cannot discard the fact that At-Ta transversions are also induced. In addition, the data indicate that the mutational specificity of ciprofloxacin depends on the location of the target. Intragenic base-pair substitutions are the most frequent mutations at the hisG428 target when it is on the chromosome, whereas 3 or 6 base-pair deletions are the major mutagenic events when this target is on the plasmid pAQ1. We have shown that ciprofloxacin also induces deletions/insertions at the hisC3076 and hisD3052 frameshift targets. Therefore, this inhibitor of DNA gyrase promotes a wide pattern of mutations including different kinds of base-pair substitutions, 3 or 6 base-pair deletions, and insertions/deletions resulting in frameshifts. All of these mutagenic events require the MucAb proteins involved in the error-prone repair, with the exception of base-pair insertions/deletions at the hisD3052 target, which are independent of the presence of plasmid pKM101.
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Affiliation(s)
- B Clerch
- Department de Genètica i de Microbiologia, Universitat Autònoma de Barcelona, Spain
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Wieland B, Feil C, Gloria-Maercker E, Thumm G, Lechner M, Bravo JM, Poralla K, Götz F. Genetic and biochemical analyses of the biosynthesis of the yellow carotenoid 4,4'-diaponeurosporene of Staphylococcus aureus. J Bacteriol 1994; 176:7719-26. [PMID: 8002598 PMCID: PMC197231 DOI: 10.1128/jb.176.24.7719-7726.1994] [Citation(s) in RCA: 122] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
Abstract
The major pigment produced by Staphylococcus aureus Newman is the deep-yellow carotenoid 4,4'-diaponeurosporene; after prolonged cultivation, this pigment is in part converted to the orange end product staphyloxanthin. From this strain a 3.5-kb DNA fragment was identified which after being cloned into Escherichia coli and Staphylococcus carnosus conferred the ability to produce 4,4'-diaponeurosporene. DNA sequencing of this fragment revealed two open reading frames (ORFs) which are very likely cotranscribed. ORF1 encodes a 254-amino-acid hydrophobic protein, CrtM (M(r), 30,121). The deduced sequence of CrtM exhibits in three domains similarities to the sequences of Saccharomyces cerevisiae and human squalene synthases and phytoene synthases of various bacteria. ORF2 encodes a 448-amino-acid hydrophobic protein, CrtN, with an M(r) of 50,853 whose deduced sequence is similar to those of phytoene desaturases of other bacteria. At the N terminus of CrtN a classical FAD-, NAD(P)-binding domain is found. Spectrophotometry and gas chromatography-mass spectrometry analyses of the carotenoid production of E. coli and S. carnosus clones containing either ORF1 or both ORFs together suggest that ORF1 and ORF2 represent the dehydrosqualene synthase gene (crtM) and the dehydrosqualene desaturase gene (crtN), respectively. The results furthermore suggest that the biosynthesis of 4,4'-diaponeurosporene starts with the condensation of two molecules of farnesyl diphosphate by dehydrosqualene synthase (CrtM); it is shown that the reaction product of this enzyme is dehydrosqualene and not squalene. Dehydrosqualene (4,4'-diapophytoene) is successively dehydrogenated by a desaturase (CrtN) to form the yellow main intermediate 4,4'-diaponeurosporene.
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Affiliation(s)
- B Wieland
- Mikrobielle Genetik, Universität Tübingen, Federal Republic of Germany
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Fernandez JM, Metlich MA, Bravo JM, Freyre IC. Oral-cutaneous fistula of dental origin. J Oral Maxillofac Surg 1982; 40:183-5. [PMID: 6950067 DOI: 10.1016/0278-2391(82)90057-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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