TOP3B

From Wikipedia, the free encyclopedia

Topoisomerase (DNA) III beta

Identifiers

TOP3B; FLJ39376

External IDs

OMIM: 603582 MGI: 1333803 HomoloGene: 2923

Gene ontology
Molecular Function:	• DNA topoisomerase type I activity • protein binding
Cellular Component:	• condensed chromosome • nucleus
Biological Process:	• DNA topological change • DNA unwinding during replication • DNA modification • chromosome organization and biogenesis (sensu Eukaryota) • chromosome segregation

Orthologs

Human

Mouse

n/a

n/a

Refseq

NM_003935 (mRNA)
NP_003926 (protein)

NM_011624 (mRNA)
NP_035754 (protein)

Location

n/a

Chr 16: 16.78 - 16.81 Mb

Pubmed search

[1]

[2]

Topoisomerase (DNA) III beta, also known as TOP3B, is a human gene.^[1]

This gene encodes a DNA topoisomerase, an enzyme that controls and alters the topologic states of DNA during transcription. This enzyme catalyzes the transient breaking and rejoining of a single strand of DNA which allows the strands to pass through one another, thus relaxing the supercoils and altering the topology of DNA. The enzyme interacts with DNA helicase SGS1 and plays a role in DNA recombination, cellular aging and maintenance of genome stability. Alternative splicing of the C-terminus of this gene results in three transcript variants which have distinct tissue specificity; however, not all variants have been fully described.^[1]

[edit] References

^ ^a ^b Entrez Gene: TOP3B topoisomerase (DNA) III beta.

[edit] Further reading

Andersson B, Wentland MA, Ricafrente JY, et al. (1996). "A "double adaptor" method for improved shotgun library construction.". Anal. Biochem. 236 (1): 107-13. doi:10.1006/abio.1996.0138. PMID 8619474.
Kawasaki K, Minoshima S, Nakato E, et al. (1997). "One-megabase sequence analysis of the human immunoglobulin lambda gene locus.". Genome Res. 7 (3): 250-61. PMID 9074928.
Yu W, Andersson B, Worley KC, et al. (1997). "Large-scale concatenation cDNA sequencing.". Genome Res. 7 (4): 353-8. PMID 9110174.
Tang D, Kidd VJ (1998). "Cleavage of DFF-45/ICAD by multiple caspases is essential for its function during apoptosis.". J. Biol. Chem. 273 (44): 28549-52. PMID 9786842.
Seki T, Seki M, Onodera R, et al. (1998). "Cloning of cDNA encoding a novel mouse DNA topoisomerase III (Topo IIIbeta) possessing negatively supercoiled DNA relaxing activity, whose message is highly expressed in the testis.". J. Biol. Chem. 273 (44): 28553-6. PMID 9786843.
Ng SW, Liu Y, Hasselblatt KT, et al. (1999). "A new human topoisomerase III that interacts with SGS1 protein.". Nucleic Acids Res. 27 (4): 993-1000. PMID 9927731.
Shimamoto A, Nishikawa K, Kitao S, Furuichi Y (2000). "Human RecQ5beta, a large isomer of RecQ5 DNA helicase, localizes in the nucleoplasm and interacts with topoisomerases 3alpha and 3beta.". Nucleic Acids Res. 28 (7): 1647-55. PMID 10710432.
Kobayashi M, Hanai R (2001). "M phase-specific association of human topoisomerase IIIbeta with chromosomes.". Biochem. Biophys. Res. Commun. 287 (1): 282-7. doi:10.1006/bbrc.2001.5580. PMID 11549288.
Strausberg RL, Feingold EA, Grouse LH, et al. (2003). "Generation and initial analysis of more than 15,000 full-length human and mouse cDNA sequences.". Proc. Natl. Acad. Sci. U.S.A. 99 (26): 16899-903. doi:10.1073/pnas.242603899. PMID 12477932.
Ota T, Suzuki Y, Nishikawa T, et al. (2004). "Complete sequencing and characterization of 21,243 full-length human cDNAs.". Nat. Genet. 36 (1): 40-5. doi:10.1038/ng1285. PMID 14702039.
Lehner B, Sanderson CM (2004). "A protein interaction framework for human mRNA degradation.". Genome Res. 14 (7): 1315-23. doi:10.1101/gr.2122004. PMID 15231747.
Cho YH, Park JY, Han SY, Chung IK (2004). "Identification of the functional elements in the promoter region of human DNA topoisomerase IIIbeta gene.". Biochim. Biophys. Acta 1679 (3): 272-8. doi:10.1016/j.bbaexp.2004.08.001. PMID 15358519.
Collins JE, Wright CL, Edwards CA, et al. (2005). "A genome annotation-driven approach to cloning the human ORFeome.". Genome Biol. 5 (10): R84. doi:10.1186/gb-2004-5-10-r84. PMID 15461802.
Gerhard DS, Wagner L, Feingold EA, et al. (2004). "The status, quality, and expansion of the NIH full-length cDNA project: the Mammalian Gene Collection (MGC).". Genome Res. 14 (10B): 2121-7. doi:10.1101/gr.2596504. PMID 15489334.
Rual JF, Venkatesan K, Hao T, et al. (2005). "Towards a proteome-scale map of the human protein-protein interaction network.". Nature 437 (7062): 1173-8. doi:10.1038/nature04209. PMID 16189514.