High-risk HPV E6 oncoproteins assemble into large oligomers that allow localization of endogenous species in prototypic HPV-transformed cell lines
The E6 oncoproteins of high-risk HPV types 16 and 18 are involved in the development of cervical cancer. Besides its determinant role in carcinogenic progression, HPV E6 oncoprotein has also been instrumental in elucidating fundamental aspects of p53 function and its ubiquitin-proteasome degradation...
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2007
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| Acceso en línea: | Registro en Scopus DOI Handle Registro en la Biblioteca Digital |
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| LEADER | 13141caa a22016457a 4500 | ||
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| 001 | PAPER-6768 | ||
| 003 | AR-BaUEN | ||
| 005 | 20230518203629.0 | ||
| 008 | 190411s2007 xx ||||fo|||| 00| 0 eng|d | ||
| 024 | 7 | |2 scopus |a 2-s2.0-33846238969 | |
| 024 | 7 | |2 cas |a proteasome, 140879-24-9; ubiquitin, 60267-61-0; DNA, Viral; DNA-Binding Proteins; E6 protein, Human papillomavirus type 16; E6 protein, Human papillomavirus type 18; Multiprotein Complexes; Oncogene Proteins, Viral; Repressor Proteins; TP53 protein, human; Tumor Suppressor Protein p53 | |
| 040 | |a Scopus |b spa |c AR-BaUEN |d AR-BaUEN | ||
| 030 | |a BICHA | ||
| 100 | 1 | |a García-Alai, M.M. | |
| 245 | 1 | 0 | |a High-risk HPV E6 oncoproteins assemble into large oligomers that allow localization of endogenous species in prototypic HPV-transformed cell lines |
| 260 | |c 2007 | ||
| 270 | 1 | 0 | |m De Prat-Gay, G.; Instituto Leloir and CONICET, Patricias Argentinas 435, 1405 Buenos Aires, Argentina |
| 506 | |2 openaire |e Política editorial | ||
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| 504 | |a Cole, S.T., Danos, O., Nucleotide sequence and comparative analysis of the human papillomavirus type 18 genome. Phylogeny of papillomaviruses and repeated structure of the E6 and E7 gene products (1987) J. Mol. Biol, 193, pp. 599-608. , 28 | ||
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| 520 | 3 | |a The E6 oncoproteins of high-risk HPV types 16 and 18 are involved in the development of cervical cancer. Besides its determinant role in carcinogenic progression, HPV E6 oncoprotein has also been instrumental in elucidating fundamental aspects of p53 function and its ubiquitin-proteasome degradation, with counterpart activities in various DNA tumor viruses. Establishing the conformational state and cellular distribution unequivocally for the endogenous protein in HPV-transformed cell lines derived from carcinomas is essential for understanding the underlying mechanism. Recombinant E6 from high-risk strains 16 and 18 folds into soluble oligomers of ∼1.2 MDa, which are thermostable and display cooperative loss of tertiary and secondary structure upon chemical denaturation. Antibodies raised against these assemblies locate E6 evenly distributed in the cells. By depleting the polyclonal serum by immunoblocking with monomeric E6, the nuclei of Hela and CaSki cells become completely devoid of label, indicating that monomeric species are mainly localized in the nucleus and that both monomers and oligomers share epitopes. The monomeric species promote degradation of p53 by the proteasome, which correlates with the nuclear localization we describe. In contrast, the oligomeric E6 does not promote p53 degradation, in agreement with its cytoplasmic localization inferred from the immunoneutralization experiments. Our results indicate that the cytoplasmic species contain conformational epitopes that may arise from yet undefined homo or hetero-oligomers, but its localization otherwise agrees with that of the other group of major E6 targets, those involving PDZ binding domains, which requires further investigation. © 2007 American Chemical Society. |l eng | |
| 593 | |a Instituto Leloir and CONICET, Patricias Argentinas 435, 1405 Buenos Aires, Argentina | ||
| 593 | |a Facultad de Ciencias Exactas Y Naturales, UBA, Buenos Aires, Argentina | ||
| 690 | 1 | 0 | |a ANTIBODIES |
| 690 | 1 | 0 | |a BIODEGRADATION |
| 690 | 1 | 0 | |a CELLS |
| 690 | 1 | 0 | |a MONOMERS |
| 690 | 1 | 0 | |a OLIGOMERS |
| 690 | 1 | 0 | |a ONCOLOGY |
| 690 | 1 | 0 | |a CARCINOGENIC PROGRESSION |
| 690 | 1 | 0 | |a CERVICAL CANCER |
| 690 | 1 | 0 | |a ENDOGENOUS PROTEIN |
| 690 | 1 | 0 | |a UBIQUITIN-PROTEASOME DEGRADATION |
| 690 | 1 | 0 | |a PROTEINS |
| 690 | 1 | 0 | |a OLIGOMER |
| 690 | 1 | 0 | |a PDZ PROTEIN |
| 690 | 1 | 0 | |a PROTEASOME |
| 690 | 1 | 0 | |a PROTEIN ANTIBODY |
| 690 | 1 | 0 | |a PROTEIN E6 |
| 690 | 1 | 0 | |a PROTEIN P53 |
| 690 | 1 | 0 | |a RECOMBINANT PROTEIN |
| 690 | 1 | 0 | |a UBIQUITIN |
| 690 | 1 | 0 | |a ARTICLE |
| 690 | 1 | 0 | |a CANCER GROWTH |
| 690 | 1 | 0 | |a CARCINOGENESIS |
| 690 | 1 | 0 | |a CELL LINE |
| 690 | 1 | 0 | |a CELL NUCLEUS |
| 690 | 1 | 0 | |a CELLULAR DISTRIBUTION |
| 690 | 1 | 0 | |a CONTROLLED STUDY |
| 690 | 1 | 0 | |a DNA TUMOR VIRUS |
| 690 | 1 | 0 | |a EMBRYO |
| 690 | 1 | 0 | |a HELA CELL |
| 690 | 1 | 0 | |a HUMAN |
| 690 | 1 | 0 | |a HUMAN CELL |
| 690 | 1 | 0 | |a NONHUMAN |
| 690 | 1 | 0 | |a PARTICLE SIZE |
| 690 | 1 | 0 | |a PRIORITY JOURNAL |
| 690 | 1 | 0 | |a PROTEIN ANALYSIS |
| 690 | 1 | 0 | |a PROTEIN ASSEMBLY |
| 690 | 1 | 0 | |a PROTEIN BINDING |
| 690 | 1 | 0 | |a PROTEIN CONFORMATION |
| 690 | 1 | 0 | |a PROTEIN DEGRADATION |
| 690 | 1 | 0 | |a PROTEIN DENATURATION |
| 690 | 1 | 0 | |a PROTEIN DOMAIN |
| 690 | 1 | 0 | |a PROTEIN FUNCTION |
| 690 | 1 | 0 | |a PROTEIN LOCALIZATION |
| 690 | 1 | 0 | |a PROTEIN QUATERNARY STRUCTURE |
| 690 | 1 | 0 | |a PROTEIN TARGETING |
| 690 | 1 | 0 | |a PROTEIN TERTIARY STRUCTURE |
| 690 | 1 | 0 | |a PROTEIN TRANSPORT |
| 690 | 1 | 0 | |a SERUM |
| 690 | 1 | 0 | |a STRUCTURAL PROTEOMICS |
| 690 | 1 | 0 | |a THERMOSTABILITY |
| 690 | 1 | 0 | |a UTERINE CERVIX CANCER |
| 690 | 1 | 0 | |a VIRUS CELL TRANSFORMATION |
| 690 | 1 | 0 | |a VIRUS STRAIN |
| 690 | 1 | 0 | |a VIRUS TYPING |
| 690 | 1 | 0 | |a WART VIRUS |
| 690 | 1 | 0 | |a BASE SEQUENCE |
| 690 | 1 | 0 | |a CELL LINE, TRANSFORMED |
| 690 | 1 | 0 | |a CELL TRANSFORMATION, NEOPLASTIC |
| 690 | 1 | 0 | |a CELL TRANSFORMATION, VIRAL |
| 690 | 1 | 0 | |a DNA, VIRAL |
| 690 | 1 | 0 | |a DNA-BINDING PROTEINS |
| 690 | 1 | 0 | |a FEMALE |
| 690 | 1 | 0 | |a HUMAN PAPILLOMAVIRUS 16 |
| 690 | 1 | 0 | |a HUMAN PAPILLOMAVIRUS 18 |
| 690 | 1 | 0 | |a HUMANS |
| 690 | 1 | 0 | |a MODELS, BIOLOGICAL |
| 690 | 1 | 0 | |a MULTIPROTEIN COMPLEXES |
| 690 | 1 | 0 | |a ONCOGENE PROTEINS, VIRAL |
| 690 | 1 | 0 | |a PROTEIN FOLDING |
| 690 | 1 | 0 | |a PROTEIN STRUCTURE, QUATERNARY |
| 690 | 1 | 0 | |a REPRESSOR PROTEINS |
| 690 | 1 | 0 | |a TUMOR SUPPRESSOR PROTEIN P53 |
| 690 | 1 | 0 | |a UTERINE CERVICAL NEOPLASMS |
| 690 | 1 | 0 | |a HUMAN PAPILLOMAVIRUS |
| 700 | 1 | |a Dantur, K.I. | |
| 700 | 1 | |a Smal, C. | |
| 700 | 1 | |a Pietrasanta, L. | |
| 700 | 1 | |a De Prat-Gay, G. | |
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