CBX3

Chromobox protein homolog 3 is a protein that is encoded by the CBX3 gene in humans.

CBX3
Available structures PDB Ortholog search: PDBe RCSB List of PDB id codes 3TZD, 2L11, 3DM1, 3KUP
Identifiers
Aliases	CBX3, HECH, HP1-GAMMA, HP1Hs-gamma, chromobox 3
External IDs	OMIM: 604477 MGI: 108515 HomoloGene: 40583 GeneCards: CBX3
Gene location (Human) Chr. Chromosome 7 (human) Band 7p15.2 Start 26,201,162 bp End 26,213,607 bp
Gene location (Mouse) Chr. Chromosome 6 (mouse) Band 6 B3|6 24.89 cM Start 51,447,340 bp End 51,460,684 bp
RNA expression pattern Bgee Human Mouse (ortholog) Top expressed in endothelial cell ganglionic eminence visceral pleura parietal pleura germinal epithelium tibia spongy bone endometrium palpebral conjunctiva Brodmann area 23 Top expressed in morula yolk sac superior frontal gyrus lip spermatid spermatocyte thymus cerebellar cortex neural tube esophagus More reference expression data BioGPS More reference expression data
Gene ontology Molecular function protein domain specific binding histone methyltransferase binding protein binding identical protein binding enzyme binding Cellular component nuclear envelope spindle nuclear inner membrane chromatin chromosome, centromeric region nucleus condensed chromosome, centromeric region nucleoplasm site of DNA damage senescence-associated heterochromatin focus Biological process chromatin remodeling regulation of transcription, DNA-templated rhythmic process transcription, DNA-templated negative regulation of transcription, DNA-templated negative regulation of G0 to G1 transition chromatin organization cellular response to DNA damage stimulus cellular response to dexamethasone stimulus Sources:Amigo / QuickGO
Orthologs Species Human Mouse Entrez 11335 12417 Ensembl ENSG00000122565 ENSMUSG00000029836 UniProt Q13185 P23198 RefSeq (mRNA) NM_007276 NM_016587 NM_001037798 NM_007624 NM_001355002 RefSeq (protein) NP_009207 NP_057671 n/a Location (UCSC) Chr 7: 26.2 – 26.21 Mb Chr 6: 51.45 – 51.46 Mb PubMed search
Wikidata
View/Edit Human View/Edit Mouse

At the nuclear envelope, the nuclear lamina and heterochromatin are adjacent to the inner nuclear membrane. The protein encoded by this gene binds DNA and is a component of heterochromatin. This protein also can bind lamin B receptor, an integral membrane protein found in the inner nuclear membrane. The dual binding functions of the encoded protein may explain the association of heterochromatin with the inner nuclear membrane. Two transcript variants encoding the same protein but differing in the 5' UTR, have been found for this gene.

Interactions

CBX3 has been shown to interact with PIM1, Ki-67, Lamin B receptor, CBX5 and CBX1.

See also

• Heterochromatin protein 1

Further reading

• Ye Q, Callebaut I, Pezhman A, et al. (1997). "Domain-specific interactions of human HP1-type chromodomain proteins and inner nuclear membrane protein LBR". J. Biol. Chem. 272 (23): 14983–9. doi:10.1074/jbc.272.23.14983. PMID 9169472.
• Lessard J, Baban S, Sauvageau G (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.
• Seeler JS, Marchio A, Sitterlin D, et al. (1998). "Interaction of SP100 with HP1 proteins: A link between the promyelocytic leukemia-associated nuclear bodies and the chromatin compartment". Proc. Natl. Acad. Sci. U.S.A. 95 (13): 7316–21. Bibcode:1998PNAS...95.7316S. doi:10.1073/pnas.95.13.7316. PMC 22602. PMID 9636146.
• Lehming N, Le Saux A, Schüller J, Ptashne M (1998). "Chromatin components as part of a putative transcriptional repressing complex". Proc. Natl. Acad. Sci. U.S.A. 95 (13): 7322–6. Bibcode:1998PNAS...95.7322L. doi:10.1073/pnas.95.13.7322. PMC 22604. PMID 9636147.
• Ainsztein AM, Kandels-Lewis SE, Mackay AM, Earnshaw WC (1999). "INCENP Centromere and Spindle Targeting: Identification of Essential Conserved Motifs and Involvement of Heterochromatin Protein HP1". J. Cell Biol. 143 (7): 1763–74. doi:10.1083/jcb.143.7.1763. PMC 2175214. PMID 9864353.
• Ryan RF, Schultz DC, Ayyanathan K, et al. (1999). "KAP-1 Corepressor Protein Interacts and Colocalizes with Heterochromatic and Euchromatic HP1 Proteins: a Potential Role for Krüppel-Associated Box–Zinc Finger Proteins in Heterochromatin-Mediated Gene Silencing". Mol. Cell. Biol. 19 (6): 4366–78. doi:10.1128/mcb.19.6.4366. PMC 104396. PMID 10330177.
• Minc E, Allory Y, Worman HJ, et al. (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.
• Nielsen AL, Ortiz JA, You J, et al. (2000). "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". EMBO J. 18 (22): 6385–95. doi:10.1093/emboj/18.22.6385. PMC 1171701. PMID 10562550.
• Koike N, Maita H, Taira T, et al. (2000). "Identification of heterochromatin protein 1 (HP1) as a phosphorylation target by Pim-1 kinase and the effect of phosphorylation on the transcriptional repression function of HP1(1)". FEBS Lett. 467 (1): 17–21. doi:10.1016/S0014-5793(00)01105-4. PMID 10664448. S2CID 29392124.
• Minc E, Courvalin JC, Buendia B (2001). "HP1gamma associates with euchromatin and heterochromatin in mammalian nuclei and chromosomes". Cytogenet. Cell Genet. 90 (3–4): 279–84. doi:10.1159/000056789. PMID 11124534. S2CID 24349769.
• Lachner M, O'Carroll D, Rea S, et al. (2001). "Methylation of histone H3 lysine 9 creates a binding site for HP1 proteins". Nature. 410 (6824): 116–20. Bibcode:2001Natur.410..116L. doi:10.1038/35065132. PMID 11242053. S2CID 4331863.
• Nielsen AL, Oulad-Abdelghani M, Ortiz JA, et al. (2001). "Heterochromatin formation in mammalian cells: interaction between histones and HP1 proteins". Mol. Cell. 7 (4): 729–39. doi:10.1016/S1097-2765(01)00218-0. hdl:10261/308369. PMID 11336697.
• Scholzen T, Endl E, Wohlenberg C, et al. (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". J. Pathol. 196 (2): 135–44. doi:10.1002/path.1016. PMID 11793364. S2CID 36130549.
• Vassallo MF, Tanese N (2002). "Isoform-specific interaction of HP1 with human TAFII130". Proc. Natl. Acad. Sci. U.S.A. 99 (9): 5919–24. Bibcode:2002PNAS...99.5919V. doi:10.1073/pnas.092025499. PMC 122877. PMID 11959914.
• Ogawa H, Ishiguro K, Gaubatz S, et al. (2002). "A complex with chromatin modifiers that occupies E2F- and Myc-responsive genes in G0 cells". Science. 296 (5570): 1132–6. Bibcode:2002Sci...296.1132O. doi:10.1126/science.1069861. PMID 12004135. S2CID 34863978.
• Hwang KK, Worman HJ (2002). "Gene regulation by human orthologs of Drosophila heterochromatin protein 1". Biochem. Biophys. Res. Commun. 293 (4): 1217–22. doi:10.1016/S0006-291X(02)00377-7. PMID 12054505.
• 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. Bibcode:2002PNAS...9916899M. doi:10.1073/pnas.242603899. PMC 139241. PMID 12477932.
• Kametaka A, Takagi M, Hayakawa T, et al. (2003). "Interaction of the chromatin compaction-inducing domain (LR domain) of Ki-67 antigen with HP1 proteins". Genes Cells. 7 (12): 1231–42. doi:10.1046/j.1365-2443.2002.00596.x. PMID 12485163. S2CID 6802841.
• Cheutin T, McNairn AJ, Jenuwein T, et al. (2003). "Maintenance of stable heterochromatin domains by dynamic HP1 binding". Science. 299 (5607): 721–5. Bibcode:2003Sci...299..721C. doi:10.1126/science.1078572. PMID 12560555. S2CID 32776616.

External links

• CBX3+protein,+human at the U.S. National Library of Medicine Medical Subject Headings (MeSH)
• Human CBX3 genome location and CBX3 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.