7tre

Structural highlights

Function

ACD_HUMAN Component of the shelterin complex (telosome) that is involved in the regulation of telomere length and protection. Shelterin associates with arrays of double-stranded TTAGGG repeats added by telomerase and protects chromosome ends; without its protective activity, telomeres are no longer hidden from the DNA damage surveillance and chromosome ends are inappropriately processed by DNA repair pathways. Promotes binding of POT1 to single-stranded telomeric DNA. Modulates the inhibitory effects of POT1 on telomere elongation. The ACD-POT1 heterodimer enhances telomere elongation by increasing telomerase processivity. Plays a role in shelterin complex assembly. May play a role in organogenesis.^{[1] [2] [3] [4] [5]}

See Also

• Telomerase 3D structures

References

1. ↑ Liu D, Safari A, O'Connor MS, Chan DW, Laegeler A, Qin J, Songyang Z. PTOP interacts with POT1 and regulates its localization to telomeres. Nat Cell Biol. 2004 Jul;6(7):673-80. Epub 2004 Jun 6. PMID:15181449 doi:http://dx.doi.org/10.1038/ncb1142
2. ↑ de Lange T. Shelterin: the protein complex that shapes and safeguards human telomeres. Genes Dev. 2005 Sep 15;19(18):2100-10. PMID:16166375 doi:10.1101/gad.1346005
3. ↑ O'Connor MS, Safari A, Xin H, Liu D, Songyang Z. A critical role for TPP1 and TIN2 interaction in high-order telomeric complex assembly. Proc Natl Acad Sci U S A. 2006 Aug 8;103(32):11874-9. Epub 2006 Jul 31. PMID:16880378 doi:0605303103
4. ↑ Zaug AJ, Podell ER, Nandakumar J, Cech TR. Functional interaction between telomere protein TPP1 and telomerase. Genes Dev. 2010 Mar 15;24(6):613-22. doi: 10.1101/gad.1881810. PMID:20231318 doi:10.1101/gad.1881810
5. ↑ Wang F, Podell ER, Zaug AJ, Yang Y, Baciu P, Cech TR, Lei M. The POT1-TPP1 telomere complex is a telomerase processivity factor. Nature. 2007 Feb 1;445(7127):506-10. Epub 2007 Jan 21. PMID:17237768 doi:nature05454