CBX1

Chromobox protein homolog 1 is a protein that in humans is encoded by the CBX1 gene.^[5][6]

CBX1
Available structures PDB Ortholog search: PDBe RCSB List of PDB id codes 3Q6S, 2FMM, 3F2U
Identifiers
Aliases	CBX1, CBX, HP1-BETA, HP1Hs-beta, HP1Hsbeta, M31, MOD1, p25beta, chromobox 1
External IDs	OMIM: 604511; MGI: 105369; HomoloGene: 89116; GeneCards: CBX1; OMA:CBX1 - orthologs
Gene location (Human) Chr. Chromosome 17 (human)[1] Band 17q21.32 Start 48,070,052 bp[1] End 48,101,478 bp[1]
Gene location (Mouse) Chr. Chromosome 11 (mouse)[2] Band 11 D|11 60.11 cM Start 96,679,953 bp[2] End 96,699,466 bp[2]
RNA expression pattern Bgee Human Mouse (ortholog) Top expressed in ganglionic eminence ventricular zone secondary oocyte tendon of biceps brachii internal globus pallidus C1 segment endothelial cell optic nerve amniotic fluid Amygdala Top expressed in otic placode saccule Gonadal ridge genital tubercle mandibular prominence tail of embryo abdominal wall maxillary prominence otic vesicle vas deferens More reference expression data BioGPS More reference expression data
Gene ontology Molecular function histone methyltransferase binding enzyme binding chromatin binding protein binding protein homodimerization activity identical protein binding Cellular component chromocenter pericentric heterochromatin chromatin spindle chromosome, centromeric region male pronucleus female pronucleus nucleoplasm nucleus site of DNA damage Biological process negative regulation of transcription, DNA-templated cellular response to DNA damage stimulus Sources:Amigo / QuickGO
Orthologs Species Human Mouse Entrez 10951 12412 Ensembl ENSG00000108468 ENSMUSG00000018666 UniProt P83916 P83917 RefSeq (mRNA) NM_006807 NM_001127228 NM_007622 NM_001362560 NM_001362561 NM_001362563 NM_001362564 RefSeq (protein) NP_001120700 NP_006798 NP_031648 NP_001349489 NP_001349490 NP_001349492 NP_001349493 Location (UCSC) Chr 17: 48.07 – 48.1 Mb Chr 11: 96.68 – 96.7 Mb PubMed search [3] [4]
Wikidata
View/Edit Human View/Edit Mouse

Function

The protein is localized at heterochromatin sites, where it mediates gene silencing.^[6]

Interactions

CBX1 has been shown to interact with:

• C11orf30,^[7]
• CBX3^[8] and
• CBX5,^[8] and
• SUV39H1.^[9]

See also

• Heterochromatin protein 1

References

1. GRCh38: Ensembl release 89: ENSG00000108468 – Ensembl, May 2017
2. GRCm38: Ensembl release 89: ENSMUSG00000018666 – 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. Furuta K, Chan EK, Kiyosawa K, Reimer G, Luderschmidt C, Tan EM (Jun 1997). "Heterochromatin protein HP1Hsbeta (p25beta) and its localization with centromeres in mitosis". Chromosoma. 106 (1): 11–9. doi:10.1007/s004120050219. PMID 9169582. S2CID 33460511.
6. "Entrez Gene: CBX1 chromobox homolog 1 (HP1 beta homolog Drosophila )".
7. Hughes-Davies L, Huntsman D, Ruas M, Fuks F, Bye J, Chin SF, Milner J, Brown LA, Hsu F, Gilks B, Nielsen T, Schulzer M, Chia S, Ragaz J, Cahn A, Linger L, Ozdag H, Cattaneo E, Jordanova ES, Schuuring E, Yu DS, Venkitaraman A, Ponder B, Doherty A, Aparicio S, Bentley D, Theillet C, Ponting CP, Caldas C, Kouzarides T (Nov 2003). "EMSY links the BRCA2 pathway to sporadic breast and ovarian cancer". Cell. 115 (5): 523–35. doi:10.1016/s0092-8674(03)00930-9. PMID 14651845. S2CID 18911371.
8. Nielsen AL, Oulad-Abdelghani M, Ortiz JA, Remboutsika E, Chambon P, Losson R (Apr 2001). "Heterochromatin formation in mammalian cells: interaction between histones and HP1 proteins". Molecular Cell. 7 (4): 729–39. doi:10.1016/S1097-2765(01)00218-0. hdl:10261/308369. PMID 11336697.
9. Aagaard L, Laible G, Selenko P, Schmid M, Dorn R, Schotta G, Kuhfittig S, Wolf A, Lebersorger A, Singh PB, Reuter G, Jenuwein T (Apr 1999). "Functional mammalian homologues of the Drosophila PEV-modifier Su(var)3-9 encode centromere-associated proteins which complex with the heterochromatin component M31". The EMBO Journal. 18 (7): 1923–38. doi:10.1093/emboj/18.7.1923. PMC 1171278. PMID 10202156.

Further reading

• Lessard J, Baban S, Sauvageau G (Feb 1998). "Stage-specific expression of polycomb group genes in human bone marrow cells". Blood. 91 (4): 1216–24. doi:10.1182/blood.V91.4.1216. PMID 9454751.
• Aagaard L, Laible G, Selenko P, Schmid M, Dorn R, Schotta G, Kuhfittig S, Wolf A, Lebersorger A, Singh PB, Reuter G, Jenuwein T (Apr 1999). "Functional mammalian homologues of the Drosophila PEV-modifier Su(var)3-9 encode centromere-associated proteins which complex with the heterochromatin component M31". The EMBO Journal. 18 (7): 1923–38. doi:10.1093/emboj/18.7.1923. PMC 1171278. PMID 10202156.
• Minc E, Allory Y, Worman HJ, Courvalin JC, Buendia B (Aug 1999). "Localization and phosphorylation of HP1 proteins during the cell cycle in mammalian cells". Chromosoma. 108 (4): 220–34. doi:10.1007/s004120050372. PMID 10460410. S2CID 12381860.
• Murzina N, Verreault A, Laue E, Stillman B (Oct 1999). "Heterochromatin dynamics in mouse cells: interaction between chromatin assembly factor 1 and HP1 proteins". Molecular Cell. 4 (4): 529–40. doi:10.1016/S1097-2765(00)80204-X. PMID 10549285.
• Nielsen AL, Ortiz JA, You J, Oulad-Abdelghani M, Khechumian R, Gansmuller A, Chambon P, Losson R (Nov 1999). "Interaction with members of the heterochromatin protein 1 (HP1) family and histone deacetylation are differentially involved in transcriptional silencing by members of the TIF1 family". The EMBO Journal. 18 (22): 6385–95. doi:10.1093/emboj/18.22.6385. PMC 1171701. PMID 10562550.
• Brasher SV, Smith BO, Fogh RH, Nietlispach D, Thiru A, Nielsen PR, Broadhurst RW, Ball LJ, Murzina NV, Laue ED (Apr 2000). "The structure of mouse HP1 suggests a unique mode of single peptide recognition by the shadow chromo domain dimer". The EMBO Journal. 19 (7): 1587–97. doi:10.1093/emboj/19.7.1587. PMC 310228. PMID 10747027.
• Zhao T, Heyduk T, Allis CD, Eissenberg JC (Sep 2000). "Heterochromatin protein 1 binds to nucleosomes and DNA in vitro". The Journal of Biological Chemistry. 275 (36): 28332–8. doi:10.1074/jbc.M003493200. PMID 10882726.
• Lachner M, O'Carroll D, Rea S, Mechtler K, Jenuwein T (Mar 2001). "Methylation of histone H3 lysine 9 creates a binding site for HP1 proteins". Nature. 410 (6824): 116–20. doi:10.1038/35065132. PMID 11242053. S2CID 4331863.
• Bannister AJ, Zegerman P, Partridge JF, Miska EA, Thomas JO, Allshire RC, Kouzarides T (Mar 2001). "Selective recognition of methylated lysine 9 on histone H3 by the HP1 chromo domain". Nature. 410 (6824): 120–4. doi:10.1038/35065138. PMID 11242054. S2CID 4334447.
• Nielsen AL, Oulad-Abdelghani M, Ortiz JA, Remboutsika E, Chambon P, Losson R (Apr 2001). "Heterochromatin formation in mammalian cells: interaction between histones and HP1 proteins". Molecular Cell. 7 (4): 729–39. doi:10.1016/S1097-2765(01)00218-0. hdl:10261/308369. PMID 11336697.
• Andersen JS, Lyon CE, Fox AH, Leung AK, Lam YW, Steen H, Mann M, Lamond AI (Jan 2002). "Directed proteomic analysis of the human nucleolus". Current Biology. 12 (1): 1–11. Bibcode:2002CBio...12....1A. doi:10.1016/S0960-9822(01)00650-9. PMID 11790298. S2CID 14132033.
• Scholzen T, Endl E, Wohlenberg C, van der Sar S, Cowell IG, Gerdes J, Singh PB (Feb 2002). "The Ki-67 protein interacts with members of the heterochromatin protein 1 (HP1) family: a potential role in the regulation of higher-order chromatin structure". The Journal of Pathology. 196 (2): 135–44. doi:10.1002/path.1016. PMID 11793364. S2CID 36130549.
• Nielsen PR, Nietlispach D, Mott HR, Callaghan J, Bannister A, Kouzarides T, Murzin AG, Murzina NV, Laue ED (Mar 2002). "Structure of the HP1 chromodomain bound to histone H3 methylated at lysine 9". Nature. 416 (6876): 103–7. Bibcode:2002Natur.416..103N. doi:10.1038/nature722. PMID 11882902. S2CID 4423019.
• Vassallo MF, Tanese N (Apr 2002). "Isoform-specific interaction of HP1 with human TAFII130". Proceedings of the National Academy of Sciences of the United States of America. 99 (9): 5919–24. Bibcode:2002PNAS...99.5919V. doi:10.1073/pnas.092025499. PMC 122877. PMID 11959914.
• Hwang KK, Worman HJ (May 2002). "Gene regulation by human orthologs of Drosophila heterochromatin protein 1". Biochemical and Biophysical Research Communications. 293 (4): 1217–22. doi:10.1016/S0006-291X(02)00377-7. PMID 12054505.
• Bhattacharya N, Wang Z, Davitt C, McKenzie IF, Xing PX, Magnuson NS (Jul 2002). "Pim-1 associates with protein complexes necessary for mitosis". Chromosoma. 111 (2): 80–95. doi:10.1007/s00412-002-0192-6. PMID 12111331. S2CID 26016943.
• Lin CY, Li CC, Huang PH, Lee FJ (Dec 2002). "A developmentally regulated ARF-like 5 protein (ARL5), localized to nuclei and nucleoli, interacts with heterochromatin protein 1". Journal of Cell Science. 115 (Pt 23): 4433–45. doi:10.1242/jcs.00123. PMID 12414990. S2CID 16851984.
• Festenstein R, Pagakis SN, Hiragami K, Lyon D, Verreault A, Sekkali B, Kioussis D (Jan 2003). "Modulation of heterochromatin protein 1 dynamics in primary Mammalian cells". Science. 299 (5607): 719–21. Bibcode:2003Sci...299..719F. doi:10.1126/science.1078694. PMID 12560554. S2CID 26661977.

External links

• CBX1+protein,+human at the U.S. National Library of Medicine Medical Subject Headings (MeSH)
• Human CBX1 genome location and CBX1 gene details page in the UCSC Genome Browser.

This article incorporates text from the United States National Library of Medicine, which is in the public domain.