X-ray repair cross complementing 5

mammalian protein found in Homo sapiens
Protein protein Q21116582
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Summary

X-ray repair cross complementing 5 is a protein[1]. It is known by 19 alternative names across languages and contexts.[2]

Key Facts

  • Part of: SPOC-like, C-terminal domain superfamily[3], Ku, C-terminal domain superfamily[4], von Willebrand factor A-like domain superfamily[5], Ku80[6], Ku, C-terminal domain, protein family[7], Ku70/Ku80, N-terminal alpha/beta, protein family[8], Ku70/Ku80 C-terminal arm, protein family[9], Ku70/Ku80 beta-barrel domain, protein family[10], von Willebrand factor, type A, protein family[11]
  • Has part(s): Ku70/Ku80 C-terminal arm[12], Ku, C-terminal[13], von Willebrand factor, type A[14], Ku70/Ku80, N-terminal alpha/beta[15], Ku70/Ku80 beta-barrel domain[16]
  • Molecular function: DNA binding[17], nucleotide binding[18], double-stranded telomeric DNA binding[19], telomeric DNA binding[20], helicase activity[21], 5'-deoxyribose-5-phosphate lyase activity[22], DNA helicase activity[23], hydrolase activity, acting on acid anhydrides[24], protein C-terminus binding[25], protein binding[26], hydrolase activity[27], ATP binding[28], ubiquitin protein ligase binding[29], double-stranded DNA binding[30]
  • Cell component: cytoplasm[31], cytosol[32], nuclear telomere cap complex[33], membrane[34], plasma membrane[35], nucleoplasm[36], chromosome[37], nucleolus[38], nonhomologous end joining complex[39], nucleus[40], extracellular region[41], secretory granule lumen[42], protein-DNA complex[43], Ku70:Ku80 complex[44]
  • Biological process: DNA recombination[45], regulation of transcription, DNA-templated[46], regulation of smooth muscle cell proliferation[47], transcription, DNA-templated[48], cellular response to DNA damage stimulus[49], positive regulation of neurogenesis[50], hematopoietic stem cell differentiation[51], double-strand break repair[52], negative regulation of t-circle formation[53], establishment of integrated proviral latency[54], cell population proliferation[55], negative regulation of transcription, DNA-templated[56], positive regulation of type I interferon production[57], cellular hyperosmotic salinity response[58]

References

Programmatic citations — every numbered marker resolves to a verifiable graph row below.

Direct Wikidata claims

  1. [3] ↑ . InterPro Release 71.0. ebi.ac.uk. Provenance: wikidata.org.
  2. [4] ↑ . InterPro Release 71.0. ebi.ac.uk. Provenance: wikidata.org.
  3. [5] ↑ . InterPro Release 71.0. ebi.ac.uk. Provenance: wikidata.org.
  4. [6] ↑ . InterPro Release 71.0. ebi.ac.uk. Provenance: wikidata.org.
  5. [7] ↑ . wikidata.org.
  6. [8] ↑ . wikidata.org.
  7. [9] ↑ . wikidata.org.
  8. [10] ↑ . wikidata.org.
  9. [11] ↑ . wikidata.org.
  10. [12] ↑ . InterPro Release 71.0. ebi.ac.uk. Provenance: wikidata.org.
  11. [13] ↑ . InterPro Release 71.0. ebi.ac.uk. Provenance: wikidata.org.
  12. [14] ↑ . InterPro Release 71.0. ebi.ac.uk. Provenance: wikidata.org.
  13. [15] ↑ . InterPro Release 71.0. ebi.ac.uk. Provenance: wikidata.org.
  14. [16] ↑ . InterPro Release 71.0. ebi.ac.uk. Provenance: wikidata.org.
  15. [17] ↑ . Identification of proteins binding to interferon-inducible transcriptional enhancers in hematopoietic cells. Retrieved . ebi.ac.uk. Provenance: wikidata.org.
  16. [18] ↑ . GOA. Retrieved . ebi.ac.uk. Provenance: wikidata.org.
  17. [19] ↑ . Ku binds telomeric DNA in vitro. Retrieved . ebi.ac.uk. Provenance: wikidata.org.
  18. [20] ↑ . Human Ku70/80 associates physically with telomerase through interaction with hTERT. Retrieved . ebi.ac.uk. Provenance: wikidata.org.
  19. [21] ↑ . GOA. Retrieved . ebi.ac.uk. Provenance: wikidata.org.
  20. [22] ↑ . Ku is a 5'-dRP/AP lyase that excises nucleotide damage near broken ends. Retrieved . ebi.ac.uk. Provenance: wikidata.org.
  21. [23] ↑ . Human DNA helicase II: a novel DNA unwinding enzyme identified as the Ku autoantigen. Retrieved . ebi.ac.uk. Provenance: wikidata.org.
  22. [24] ↑ . GOA. Retrieved . ebi.ac.uk. Provenance: wikidata.org.
  23. [25] ↑ . Ku complex interacts with and stimulates the Werner protein. Retrieved . ebi.ac.uk. Provenance: wikidata.org.
  24. [26] ↑ . The RNF138 E3 ligase displaces Ku to promote DNA end resection and regulate DNA repair pathway choice. Retrieved . ebi.ac.uk. Provenance: wikidata.org.
  25. [27] ↑ . GOA. Retrieved . ebi.ac.uk. Provenance: wikidata.org.
  26. [28] ↑ . GOA. Retrieved . ebi.ac.uk. Provenance: wikidata.org.
  27. [29] ↑ . The E3 ligase RNF8 regulates KU80 removal and NHEJ repair. Retrieved . ebi.ac.uk. Provenance: wikidata.org.
  28. [30] ↑ . Human DNA helicase II: a novel DNA unwinding enzyme identified as the Ku autoantigen. Retrieved . ebi.ac.uk. Provenance: wikidata.org.
  29. [31] ↑ . GOA. Retrieved . ebi.ac.uk. Provenance: wikidata.org.
  30. [32] ↑ . GOA. Retrieved . ebi.ac.uk. Provenance: wikidata.org.
  31. [33] ↑ . The human Rap1 protein complex and modulation of telomere length. Retrieved . ebi.ac.uk. Provenance: wikidata.org.
  32. [34] ↑ . Defining the membrane proteome of NK cells. Retrieved . ebi.ac.uk. Provenance: wikidata.org.
  33. [35] ↑ . GOA. Retrieved . ebi.ac.uk. Provenance: wikidata.org.
  34. [36] ↑ . GOA. Retrieved . ebi.ac.uk. Provenance: wikidata.org.
  35. [37] ↑ . GOA. Retrieved . ebi.ac.uk. Provenance: wikidata.org.
  36. [38] ↑ . GOA. Retrieved . ebi.ac.uk. Provenance: wikidata.org.
  37. [39] ↑ . XLS (c9orf142) is a new component of mammalian DNA double-stranded break repair. Retrieved . ebi.ac.uk. Provenance: wikidata.org.
  38. [40] ↑ . Human DNA helicase II: a novel DNA unwinding enzyme identified as the Ku autoantigen. Retrieved . ebi.ac.uk. Provenance: wikidata.org.
  39. [41] ↑ . GOA. Retrieved . ebi.ac.uk. Provenance: wikidata.org.
  40. [42] ↑ . GOA. Retrieved . ebi.ac.uk. Provenance: wikidata.org.
  41. [43] ↑ . Trp-tRNA synthetase bridges DNA-PKcs to PARP-1 to link IFN-γ and p53 signaling. Retrieved . ebi.ac.uk. Provenance: wikidata.org.
  42. [44] ↑ . Impaired telomerase activity in human cells expressing GFP-Ku86 fusion proteins. Retrieved . ebi.ac.uk. Provenance: wikidata.org.
  43. [45] ↑ . Ku80: product of the XRCC5 gene and its role in DNA repair and V(D)J recombination. Retrieved . ebi.ac.uk. Provenance: wikidata.org.
  44. [46] ↑ . GOA. Retrieved . ebi.ac.uk. Provenance: wikidata.org.
  45. [47] ↑ . DNA-dependent protein kinase (DNA-PK) permits vascular smooth muscle cell proliferation through phosphorylation of the orphan nuclear receptor NOR1. Retrieved . ebi.ac.uk. Provenance: wikidata.org.
  46. [48] ↑ . GOA. Retrieved . ebi.ac.uk. Provenance: wikidata.org.
  47. [49] ↑ . GOA. Retrieved . ebi.ac.uk. Provenance: wikidata.org.
  48. [50] ↑ . GOA. Retrieved . ebi.ac.uk. Provenance: wikidata.org.
  49. [51] ↑ . GOA. Retrieved . ebi.ac.uk. Provenance: wikidata.org.
  50. [52] ↑ . Ku80: product of the XRCC5 gene and its role in DNA repair and V(D)J recombination. Retrieved . ebi.ac.uk. Provenance: wikidata.org.
  51. [53] ↑ . Ku86 represses lethal telomere deletion events in human somatic cells. Retrieved . ebi.ac.uk. Provenance: wikidata.org.
  52. [54] ↑ . GOA. Retrieved . ebi.ac.uk. Provenance: wikidata.org.
  53. [55] ↑ . GOA. Retrieved . ebi.ac.uk. Provenance: wikidata.org.
  54. [56] ↑ . The interaction between Ku antigen and REF1 protein mediates negative gene regulation by extracellular calcium. Retrieved . ebi.ac.uk. Provenance: wikidata.org.
  55. [57] ↑ . GOA. Retrieved . ebi.ac.uk. Provenance: wikidata.org.
  56. [58] ↑ . GOA. Retrieved . ebi.ac.uk. Provenance: wikidata.org.

Class ancestry

  1. [1] ↑ . Wikidata. wikidata.org.

Aggregate / graph-position facts

  1. [2] ↑ . Wikidata aliases. wikidata.org.

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Use these citations when quoting this entity in research, articles, AI prompts, or wherever provenance matters. We aggregate Wikidata + Wikipedia + authoritative open-data sources; the stitched, scored, cross-referenced view is what 4ort.xyz contributes.

APA 4ort.xyz Knowledge Graph. (2026). X-ray repair cross complementing 5. Retrieved May 3, 2026, from https://4ort.xyz/entity/x-ray-repair-cross-complementing-5-q21116582
MLA “X-ray repair cross complementing 5.” 4ort.xyz Knowledge Graph, 4ort.xyz, 3 May. 2026, https://4ort.xyz/entity/x-ray-repair-cross-complementing-5-q21116582.
BibTeX @misc{4ortxyz_x-ray-repair-cross-complementing-5-q21116582_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{X-ray repair cross complementing 5}}, year = {2026}, url = {https://4ort.xyz/entity/x-ray-repair-cross-complementing-5-q21116582}, note = {Accessed: 2026-05-03}}
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Edit History

Rolling log of changes to this entity's Wikidata record. Values shown reflect the current state of each edited property — follow the history link to see the precise diff for any edit.

  1. 11w ago · Boghog · 2026-07-24 view diff on Wikidata ↗
    Imported from → —
    Encoded by → XRCC5
    Wikidata description → mammalian protein found in Homo sapiens
    Molecular function → DNA binding, nucleotide binding, double-stranded telomeric DNA binding +19
    + 11 other properties edited (see Wikidata diff for full list)
    "/* wbcreateclaim-create:1| */ Ec enzyme number: 4.2.99.18, [[:toollabs:quickstatements/#/batch/261491|batch #261491]]"
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