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XRCC1
Available structures PDB Ortholog search: PDBe RCSB List of PDB id codes 3LQC, 1CDZ, 1XNA, 1XNT, 2D8M, 2W3O, 3K75, 3K77, 5E6Q
Identifiers
Aliases	XRCC1, RCC, X-ray repair complementing defective repair in Chinese hamster cells 1, X-ray repair cross complementing 1, SCAR26
External IDs	OMIM: 194360; MGI: 99137; HomoloGene: 31368; GeneCards: XRCC1; OMA:XRCC1 - orthologs
Gene location (Human) Chr. Chromosome 19 (human) Band 19q13.31 Start 43,543,311 bp End 43,580,473 bp
Gene location (Mouse) Chr. Chromosome 7 (mouse) Band 7 A3|7 11.42 cM Start 24,245,714 bp End 24,272,865 bp
RNA expression pattern Bgee Human Mouse (ortholog) Top expressed in ventricular zone tendon of biceps brachii ganglionic eminence oocyte Pituitary Gland anterior pituitary right uterine tube left ovary right ovary granulocyte Top expressed in saccule otic placode otic vesicle superior surface of tongue gallbladder internal carotid artery ventricular zone external carotid artery epiblast primary oocyte More reference expression data BioGPS More reference expression data
Gene ontology Molecular function damaged DNA binding enzyme binding protein binding DNA ligase activity 3' overhang single-stranded DNA endodeoxyribonuclease activity oxidized DNA binding Cellular component nucleoplasm ERCC4-ERCC1 complex nucleus nucleolus Biological process single strand break repair nucleotide-excision repair, DNA gap filling transcription-coupled nucleotide-excision repair response to hypoxia response to organic substance double-strand break repair via homologous recombination cellular response to DNA damage stimulus base-excision repair, DNA ligation hippocampus development DNA repair double-strand break repair via nonhomologous end joining negative regulation of protection from non-homologous end joining at telomere telomeric DNA-containing double minutes formation base-excision repair negative regulation of protein ADP-ribosylation positive regulation of DNA ligase activity cerebellum morphogenesis response to hydroperoxide voluntary musculoskeletal movement positive regulation of single strand break repair replication-born double-strand break repair via sister chromatid exchange Sources:Amigo / QuickGO
Orthologs Species Human Mouse Entrez 7515 22594 Ensembl ENSG00000073050 ENSMUSG00000051768 UniProt P18887 Q60596 RefSeq (mRNA) NM_006297 NM_009532 NM_001360168 NM_001360169 NM_001360170 RefSeq (protein) NP_006288 NP_033558 NP_001347097 NP_001347098 NP_001347099 Location (UCSC) Chr 19: 43.54 – 43.58 Mb Chr 7: 24.25 – 24.27 Mb PubMed search
Wikidata
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DNA repair protein XRCC1, also known as X-ray repair cross-complementing protein 1, is a protein that in humans is encoded by the XRCC1 gene. XRCC1 is involved in DNA repair, where it complexes with DNA ligase III.

Function

XRCC1_N
nmr solution structure of the single-strand break repair protein xrcc1-n-terminal domain
Identifiers
Symbol	XRCC1_N
Pfam	PF01834
Pfam clan	CL0202
InterPro	IPR002706
SCOP2	1xnt / SCOPe / SUPFAM
Available protein structures: Pfam   structures / ECOD   PDB RCSB PDB; PDBe; PDBj PDBsum structure summary

XRCC1 is involved in the efficient repair of DNA single-strand breaks formed by exposure to ionizing radiation and alkylating agents. This protein interacts with DNA ligase III, polymerase beta and poly (ADP-ribose) polymerase to participate in the base excision repair pathway. It may play a role in DNA processing during meiogenesis, i.e. during the induction of meiosis and recombination in germ cells. A rare microsatellite polymorphism in this gene is associated with cancer in patients of varying radiosensitivity.

The XRCC1 protein does not have enzymatic activity, but acts as a scaffolding protein that interacts with multiple repair enzymes. The scaffolding allows these repair enzymes to then carry out their enzymatic steps in repairing DNA. XRCC1 is involved in single-strand break repair, base excision repair and nucleotide excision repair.

As reviewed by London, XRCC1 protein has three globular domains connected by two linker segments of ~150 and 120 residues. The XRCC1 N-terminal domain binds to DNA polymerase beta, the C-terminal BRCT domain interacts with DNA ligase III alpha and the central domain contains a poly(ADP-ribose) binding motif. This central domain allows recruitment of XRCC1 to polymeric ADP-ribose that forms on PARP1 after PARP1 binds to single strand breaks. The first linker contains a nuclear localization sequence and also has a region that interacts with DNA repair protein REV1, and REV1 recruits translesion polymerases. The second linker interacts with polynucleotide kinase phosphatase ( PNKP) (that processes DNA broken ends during base excision repair), aprataxin (active in single-strand DNA repair and non-homologous end joining) and a third protein designated aprataxin- and PNKP-like factor.

XRCC1 has an essential role in microhomology-mediated end joining (MMEJ) repair of double strand breaks. MMEJ is a highly error-prone DNA repair pathway that results in deletion mutations. XRCC1 is one of 6 proteins required for this pathway.

Over-expression in cancer

XRCC1 is over-expressed in non-small-cell lung carcinoma (NSCLC), and at an even higher level in metastatic lymph nodes of NSCLC.

Under-expression in cancer

Deficiency in XRCC1, due to being heterozygous for a mutated XRCC1 gene coding for a truncated XRCC1 protein, suppresses tumor growth in mice. Under three experimental conditions for inducing three types of cancer (colon cancer, melanoma or breast cancer), mice heterozygous for this XRCC1 mutation had substantially lower tumor volume or number than wild type mice undergoing the same carcinogenic treatments.

Comparison with other DNA repair genes in cancer

Cancers are very often deficient in expression of one or more DNA repair genes, but over-expression of a DNA repair gene is less usual in cancer. For instance, at least 36 DNA repair proteins, when mutationally defective in germ line cells, cause increased risk of cancer (hereditary cancer syndromes). (Also see DNA repair-deficiency disorder.) Similarly, at least 12 DNA repair genes have frequently been found to be epigenetically repressed in one or more cancers. (See also Epigenetically reduced DNA repair and cancer.) Ordinarily, deficient expression of a DNA repair enzyme results in increased un-repaired DNA damages which, through replication errors (translesion synthesis), lead to mutations and cancer. However, XRCC1 mediated MMEJ repair is directly mutagenic, so in this case, over-expression, rather than under-expression, apparently leads to cancer. Reduction of mutagenic XRCC1 mediated MMEJ repair leads to reduced progression of cancer.

Aging

In aged human adipose-derived stem cells, base excision repair (BER), but not DNA double-strand break repair, is impaired. The XRCC1 protein, but not other BER factors, showed an age-associated decline. Overexpression of XRCC1 reversed the age-associated decline of BER function.

Stroke recovery

Oxidative stress is increased in the brain during ischemic stroke leading to an increased burden on stress resistance mechanisms, including those for repairing oxidatively damaged DNA. Consequently any loss of a repair system that would ordinarily restore damaged DNA may impede survival and normal function of brain neurons. Ghosh et al. reported that partial loss of XRCC1 function causes increased DNA damage in the brain and reduced recovery from ischemic stroke. This finding indicates that XRCC1-mediated base excision repair is important for speedy recovery from stroke.

Structure

The NMR solution structure of the Xrcc1 N-terminal domain (Xrcc1 NTD) shows that the structural core is a beta-sandwich with beta-strands connected by loops, three helices and two short two-stranded beta-sheets at each connection side. The Xrcc1 NTD specifically binds single-strand break DNA (gapped and nicked) and a gapped DNA-beta-Pol complex.

Interactions

XRCC1 has been shown to interact with:

• APEX1,
• APTX,
• OGG1,
• PARP2,
• PCNA,
• PNKP,
• POLB, and
• PARP1.

References

1. ^ GRCh38: Ensembl release 89: ENSG00000073050 – Ensembl, May 2017
2. ^ GRCm38: Ensembl release 89: ENSMUSG00000051768 – Ensembl, May 2017
3. "Human PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
4. "Mouse PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
5. "Entrez Gene: XRCC1 X-ray repair complementing defective repair in Chinese hamster cells 1".
6. ^ London RE (2015). "The structural basis of XRCC1-mediated DNA repair". DNA Repair (Amst.). 30: 90–103. doi:10.1016/j.dnarep.2015.02.005. PMC 5580684. PMID 25795425.
7. Sharma S, Javadekar SM, Pandey M, Srivastava M, Kumari R, Raghavan SC (2015). "Homology and enzymatic requirements of microhomology-dependent alternative end joining". Cell Death Dis. 6 (3): e1697. doi:10.1038/cddis.2015.58. PMC 4385936. PMID 25789972.
8. Kang CH, Jang BG, Kim DW, Chung DH, Kim YT, Jheon S, Sung SW, Kim JH (2010). "The prognostic significance of ERCC1, BRCA1, XRCC1, and betaIII-tubulin expression in patients with non-small cell lung cancer treated by platinum- and taxane-based neoadjuvant chemotherapy and surgical resection". Lung Cancer. 68 (3): 478–83. doi:10.1016/j.lungcan.2009.07.004. PMID 19683826.
9. Kang CH, Jang BG, Kim DW, Chung DH, Kim YT, Jheon S, Sung SW, Kim JH (2009). "Differences in the expression profiles of excision repair crosscomplementation group 1, x-ray repair crosscomplementation group 1, and betaIII-tubulin between primary non-small cell lung cancer and metastatic lymph nodes and the significance in mid-term survival". J Thorac Oncol. 4 (11): 1307–12. doi:10.1097/JTO.0b013e3181b9f236. PMID 19745766. S2CID 30337977.
10. Pettan-Brewer C, Morton J, Cullen S, Enns L, Kehrli KR, Sidorova J, Goh J, Coil R, Ladiges WC (2012). "Tumor growth is suppressed in mice expressing a truncated XRCC1 protein". Am J Cancer Res. 2 (2): 168–77. PMC 3304571. PMID 22432057.
11. Zhang H, Cai B, Geng A, Tang H, Zhang W, Li S, Jiang Y, Tan R, Wan X, Mao Z (February 2020). "Base excision repair but not DNA double-strand break repair is impaired in aged human adipose-derived stem cells". Aging Cell. 19 (2): e13062. doi:10.1111/acel.13062. PMC 6996963. PMID 31782607.
12. Ghosh S, Canugovi C, Yoon JS, Wilson DM, Croteau DL, Mattson MP, Bohr VA (July 2015). "Partial loss of the DNA repair scaffolding protein, Xrcc1, results in increased brain damage and reduced recovery from ischemic stroke in mice". Neurobiol. Aging. 36 (7): 2319–2330. doi:10.1016/j.neurobiolaging.2015.04.004. PMC 5576895. PMID 25971543.
13. Marintchev A, Mullen MA, Maciejewski MW, Pan B, Gryk MR, Mullen GP (Sep 1999). "Solution structure of the single-strand break repair protein XRCC1 N-terminal domain". Nature Structural Biology. 6 (9): 884–93. doi:10.1038/12347. PMID 10467102. S2CID 20325918.
14. Vidal AE, Boiteux S, Hickson ID, Radicella JP (Nov 2001). "XRCC1 coordinates the initial and late stages of DNA abasic site repair through protein-protein interactions". The EMBO Journal. 20 (22): 6530–9. doi:10.1093/emboj/20.22.6530. PMC 125722. PMID 11707423.
15. Date H, Igarashi S, Sano Y, Takahashi T, Takahashi T, Takano H, Tsuji S, Nishizawa M, Onodera O (Dec 2004). "The FHA domain of aprataxin interacts with the C-terminal region of XRCC1". Biochemical and Biophysical Research Communications. 325 (4): 1279–85. doi:10.1016/j.bbrc.2004.10.162. PMID 15555565.
16. ^ Gueven N, Becherel OJ, Kijas AW, Chen P, Howe O, Rudolph JH, Gatti R, Date H, Onodera O, Taucher-Scholz G, Lavin MF (May 2004). "Aprataxin, a novel protein that protects against genotoxic stress". Human Molecular Genetics. 13 (10): 1081–93. doi:10.1093/hmg/ddh122. PMID 15044383.
17. Marsin S, Vidal AE, Sossou M, Ménissier-de Murcia J, Le Page F, Boiteux S, de Murcia G, Radicella JP (Nov 2003). "Role of XRCC1 in the coordination and stimulation of oxidative DNA damage repair initiated by the DNA glycosylase hOGG1". The Journal of Biological Chemistry. 278 (45): 44068–74. doi:10.1074/jbc.M306160200. PMID 12933815.
18. Schreiber V, Amé JC, Dollé P, Schultz I, Rinaldi B, Fraulob V, Ménissier-de Murcia J, de Murcia G (Jun 2002). "Poly(ADP-ribose) polymerase-2 (PARP-2) is required for efficient base excision DNA repair in association with PARP-1 and XRCC1" (PDF). The Journal of Biological Chemistry. 277 (25): 23028–36. doi:10.1074/jbc.M202390200. PMID 11948190.
19. ^ Fan J, Otterlei M, Wong HK, Tomkinson AE, Wilson DM (2004). "XRCC1 co-localizes and physically interacts with PCNA". Nucleic Acids Research. 32 (7): 2193–201. doi:10.1093/nar/gkh556. PMC 407833. PMID 15107487.
20. Whitehouse CJ, Taylor RM, Thistlethwaite A, Zhang H, Karimi-Busheri F, Lasko DD, Weinfeld M, Caldecott KW (Jan 2001). "XRCC1 stimulates human polynucleotide kinase activity at damaged DNA termini and accelerates DNA single-strand break repair". Cell. 104 (1): 107–17. doi:10.1016/S0092-8674(01)00195-7. PMID 11163244. S2CID 1487128.
21. Ewing RM, Chu P, Elisma F, Li H, Taylor P, Climie S, McBroom-Cerajewski L, Robinson MD, O'Connor L, Li M, Taylor R, Dharsee M, Ho Y, Heilbut A, Moore L, Zhang S, Ornatsky O, Bukhman YV, Ethier M, Sheng Y, Vasilescu J, Abu-Farha M, Lambert JP, Duewel HS, Stewart II, Kuehl B, Hogue K, Colwill K, Gladwish K, Muskat B, Kinach R, Adams SL, Moran MF, Morin GB, Topaloglou T, Figeys D (2007). "Large-scale mapping of human protein-protein interactions by mass spectrometry". Molecular Systems Biology. 3 (1): 89. doi:10.1038/msb4100134. PMC 1847948. PMID 17353931.
22. Wang L, Bhattacharyya N, Chelsea DM, Escobar PF, Banerjee S (Nov 2004). "A novel nuclear protein, MGC5306 interacts with DNA polymerase beta and has a potential role in cellular phenotype". Cancer Research. 64 (21): 7673–7. doi:10.1158/0008-5472.CAN-04-2801. PMID 15520167. S2CID 35569215.
23. Kubota Y, Nash RA, Klungland A, Schär P, Barnes DE, Lindahl T (Dec 1996). "Reconstitution of DNA base excision-repair with purified human proteins: interaction between DNA polymerase beta and the XRCC1 protein". The EMBO Journal. 15 (23): 6662–70. doi:10.1002/j.1460-2075.1996.tb01056.x. PMC 452490. PMID 8978692.
24. Bhattacharyya N, Banerjee S (Jul 2001). "A novel role of XRCC1 in the functions of a DNA polymerase beta variant". Biochemistry. 40 (30): 9005–13. doi:10.1021/bi0028789. PMID 11467963.
25. Masson M, Niedergang C, Schreiber V, Muller S, Menissier-de Murcia J, de Murcia G (Jun 1998). "XRCC1 is specifically associated with poly(ADP-ribose) polymerase and negatively regulates its activity following DNA damage". Molecular and Cellular Biology. 18 (6): 3563–71. doi:10.1128/MCB.18.6.3563. PMC 108937. PMID 9584196.

Further reading

• Hung RJ, Hall J, Brennan P, Boffetta P (Nov 2005). "Genetic polymorphisms in the base excision repair pathway and cancer risk: a HuGE review". American Journal of Epidemiology. 162 (10): 925–42. doi:10.1093/aje/kwi318. PMID 16221808.
• Thompson LH, Brookman KW, Jones NJ, Allen SA, Carrano AV (Dec 1990). "Molecular cloning of the human XRCC1 gene, which corrects defective DNA strand break repair and sister chromatid exchange". Molecular and Cellular Biology. 10 (12): 6160–71. doi:10.1128/mcb.10.12.6160. PMC 362891. PMID 2247054.
• Thompson LH, Bachinski LL, Stallings RL, Dolf G, Weber CA, Westerveld A, Siciliano MJ (Nov 1989). "Complementation of repair gene mutations on the hemizygous chromosome 9 in CHO: a third repair gene on human chromosome 19". Genomics. 5 (4): 670–9. doi:10.1016/0888-7543(89)90107-9. PMID 2591959.
• Gyapay G, Morissette J, Vignal A, Dib C, Fizames C, Millasseau P, Marc S, Bernardi G, Lathrop M, Weissenbach J (Jun 1994). "The 1993-94 Généthon human genetic linkage map". Nature Genetics. 7 (2 Spec No): 246–339. doi:10.1038/ng0694supp-246. PMID 7545953. S2CID 24662426.
• Wei Q, Xu X, Cheng L, Legerski RJ, Ali-Osman F (Nov 1995). "Simultaneous amplification of four DNA repair genes and beta-actin in human lymphocytes by multiplex reverse transcriptase-PCR". Cancer Research. 55 (21): 5025–9. PMID 7585546.
• Lamerdin JE, Montgomery MA, Stilwagen SA, Scheidecker LK, Tebbs RS, Brookman KW, Thompson LH, Carrano AV (Jan 1995). "Genomic sequence comparison of the human and mouse XRCC1 DNA repair gene regions". Genomics. 25 (2): 547–54. doi:10.1016/0888-7543(95)80056-R. PMID 7789989.
• Caldecott KW, McKeown CK, Tucker JD, Ljungquist S, Thompson LH (Jan 1994). "An interaction between the mammalian DNA repair protein XRCC1 and DNA ligase III". Molecular and Cellular Biology. 14 (1): 68–76. doi:10.1128/MCB.14.1.68. PMC 358357. PMID 8264637.
• Trask B, Fertitta A, Christensen M, Youngblom J, Bergmann A, Copeland A, de Jong P, Mohrenweiser H, Olsen A, Carrano A (Jan 1993). "Fluorescence in situ hybridization mapping of human chromosome 19: cytogenetic band location of 540 cosmids and 70 genes or DNA markers". Genomics. 15 (1): 133–45. doi:10.1006/geno.1993.1021. PMID 8432525.
• Kubota Y, Nash RA, Klungland A, Schär P, Barnes DE, Lindahl T (Dec 1996). "Reconstitution of DNA base excision-repair with purified human proteins: interaction between DNA polymerase beta and the XRCC1 protein". The EMBO Journal. 15 (23): 6662–70. doi:10.1002/j.1460-2075.1996.tb01056.x. PMC 452490. PMID 8978692.
• Nash RA, Caldecott KW, Barnes DE, Lindahl T (Apr 1997). "XRCC1 protein interacts with one of two distinct forms of DNA ligase III". Biochemistry. 36 (17): 5207–11. doi:10.1021/bi962281m. PMID 9136882.
• Shen MR, Jones IM, Mohrenweiser H (Feb 1998). "Nonconservative amino acid substitution variants exist at polymorphic frequency in DNA repair genes in healthy humans". Cancer Research. 58 (4): 604–8. PMID 9485007.
• Price EA, Bourne SL, Radbourne R, Lawton PA, Lamerdin J, Thompson LH, Arrand JE (Jul 1997). "Rare microsatellite polymorphisms in the DNA repair genes XRCC1, XRCC3 and XRCC5 associated with cancer in patients of varying radiosensitivity". Somatic Cell and Molecular Genetics. 23 (4): 237–47. doi:10.1007/BF02674415. PMID 9542526. S2CID 32956047.
• Masson M, Niedergang C, Schreiber V, Muller S, Menissier-de Murcia J, de Murcia G (Jun 1998). "XRCC1 is specifically associated with poly(ADP-ribose) polymerase and negatively regulates its activity following DNA damage". Molecular and Cellular Biology. 18 (6): 3563–71. doi:10.1128/MCB.18.6.3563. PMC 108937. PMID 9584196.
• Taylor RM, Wickstead B, Cronin S, Caldecott KW (Jul 1998). "Role of a BRCT domain in the interaction of DNA ligase III-alpha with the DNA repair protein XRCC1". Current Biology. 8 (15): 877–80. doi:10.1016/S0960-9822(07)00350-8. PMID 9705932. S2CID 17117423.
• Zhou ZQ, Walter CA (Jan 1998). "Cloning and characterization of the promoter of baboon XRCC1, a gene involved in DNA strand-break repair". Somatic Cell and Molecular Genetics. 24 (1): 23–39. doi:10.1007/BF02677493. PMID 9776979. S2CID 21863472.
• Taylor RM, Moore DJ, Whitehouse J, Johnson P, Caldecott KW (Jan 2000). "A cell cycle-specific requirement for the XRCC1 BRCT II domain during mammalian DNA strand break repair". Molecular and Cellular Biology. 20 (2): 735–40. doi:10.1128/MCB.20.2.735-740.2000. PMC 85188. PMID 10611252.
• Marintchev A, Robertson A, Dimitriadis EK, Prasad R, Wilson SH, Mullen GP (May 2000). "Domain specific interaction in the XRCC1-DNA polymerase beta complex". Nucleic Acids Research. 28 (10): 2049–59. doi:10.1093/nar/28.10.2049. PMC 105377. PMID 10773072.
• Duell EJ, Wiencke JK, Cheng TJ, Varkonyi A, Zuo ZF, Ashok TD, Mark EJ, Wain JC, Christiani DC, Kelsey KT (May 2000). "Polymorphisms in the DNA repair genes XRCC1 and ERCC2 and biomarkers of DNA damage in human blood mononuclear cells" (PDF). Carcinogenesis. 21 (5): 965–71. doi:10.1093/carcin/21.5.965. PMID 10783319.
• Whitehouse CJ, Taylor RM, Thistlethwaite A, Zhang H, Karimi-Busheri F, Lasko DD, Weinfeld M, Caldecott KW (Jan 2001). "XRCC1 stimulates human polynucleotide kinase activity at damaged DNA termini and accelerates DNA single-strand break repair". Cell. 104 (1): 107–17. doi:10.1016/S0092-8674(01)00195-7. PMID 11163244. S2CID 1487128.
• Dulic A, Bates PA, Zhang X, Martin SR, Freemont PS, Lindahl T, Barnes DE (May 2001). "BRCT domain interactions in the heterodimeric DNA repair protein XRCC1-DNA ligase III". Biochemistry. 40 (20): 5906–13. doi:10.1021/bi002701e. PMID 11352725.

External links

• X-ray+repair+cross+complementing+protein+1 at the U.S. National Library of Medicine Medical Subject Headings (MeSH)
• Overview of all the structural information available in the PDB for UniProt: P18887 (DNA repair protein XRCC1) at the PDBe-KB.

• Genes on human chromosome 19
• Protein domains