CRYBA4

CRYBA4
Available structures
PDB	Ortholog search: PDBe RCSB
List of PDB id codes
	3LWK
Identifiers
Aliases	CRYBA4, CTRCT23, MCOPCT4, CYRBA4, crystallin beta A4
External IDs	OMIM: 123631; MGI: 102716; HomoloGene: 1422; GeneCards: CRYBA4; OMA:CRYBA4 - orthologs
Gene location (Human)
Chr.	Chromosome 22 (human)
End	26,630,669 bp
Gene location (Mouse)
Chr.	Chromosome 5 (mouse)
End	112,400,384 bp
RNA expression pattern
	Top expressed in
	testicle; ; gonad; ; granulocyte; ; right testis; ; left testis; ; mucosa of transverse colon; ; spleen; ; prefrontal cortex; ; dorsolateral prefrontal cortex; ; cingulate gyrus;
	Top expressed in
	lens; ; epithelium of lens; ; conjunctival fornix; ; ciliary body; ; retinal pigment epithelium; ; lip; ; neural layer of retina; ; granulocyte; ; hair follicle; ; embryo;
	More reference expression data
	More reference expression data
Gene ontology
Molecular function	protein binding; structural constituent of eye lens; molecular function;
Cellular component	cellular component;
Biological process	camera-type eye development; visual perception; lens development in camera-type eye;
	Sources:Amigo / QuickGO
Orthologs
	1413
	12959
	ENSG00000196431
	ENSMUSG00000066975
	P53673
	Q9JJV0
	NM_001886
	NM_021351; NM_001312884
	NP_001877; NP_001877.1
	NP_001299813; NP_067326
	Wikidata
View/Edit Human	View/Edit Mouse

Beta-crystallin A4 is a protein that in humans is encoded by the CRYBA4 gene.^[5]^[6]^[7]

Crystallins are separated into two classes: taxon-specific, or enzyme, and ubiquitous. The latter class constitutes the major proteins of vertebrate eye lens and maintains the transparency and refractive index of the lens. Since lens central fiber cells lose their nuclei during development, these crystallins are made and then retained throughout life, making them extremely stable proteins.

Mammalian lens crystallins are divided into alpha, beta, and gamma families; beta and gamma crystallins are also considered as a superfamily. Alpha and beta families are further divided into acidic and basic groups. Seven protein regions exist in crystallins: four homologous motifs, a connecting peptide, and N- and C-terminal extensions.

Beta-crystallins, the most heterogeneous, differ by the presence of the C-terminal extension (present in the basic group, none in the acidic group). Beta-crystallins form aggregates of different sizes and are able to self-associate to form dimers or to form heterodimers with other beta-crystallins. This gene, a beta acidic group member, is part of a gene cluster with beta-B1, beta-B2, and beta-B3.^[7]

References

^ ^a ^b ^c GRCh38: Ensembl release 89: ENSG00000196431 – Ensembl, May 2017
^ ^a ^b ^c GRCm38: Ensembl release 89: ENSMUSG00000066975 – Ensembl, May 2017
^ "Human PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
^ "Mouse PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
^ Lampi KJ, Ma Z, Shih M, Shearer TR, Smith JB, Smith DL, David LL (Feb 1997). "Sequence analysis of betaA3, betaB3, and betaA4 crystallins completes the identification of the major proteins in young human lens". J Biol Chem. 272 (4): 2268–75. doi:10.1074/jbc.272.4.2268. PMID 8999933.
^ Schuschke G, Mielke U, Bodamer S, Rosenkranz M (Oct 1976). "[Feral domestic pigeons as a hygienic problem in big cities--the situation in Magdeburg]". Z Gesamte Hyg. 22 (1): 30–4. PMID 960806.
^ ^a ^b "Entrez Gene: CRYBA4 crystallin, beta A4".

External links

Human CRYBA4 genome location and CRYBA4 gene details page in the UCSC Genome Browser.

Billingsley G, Santhiya ST, Paterson AD, et al. (2006). "CRYBA4, a novel human cataract gene, is also involved in microphthalmia". Am. J. Hum. Genet. 79 (4): 702–9. doi:10.1086/507712. PMC 1592554. PMID 16960806.
Gerhard DS, Wagner L, Feingold EA, et al. (2004). "The status, quality, and expansion of the NIH full-length cDNA project: the Mammalian Gene Collection (MGC)". Genome Res. 14 (10B): 2121–7. doi:10.1101/gr.2596504. PMC 528928. PMID 15489334.
Collins JE, Wright CL, Edwards CA, et al. (2005). "A genome annotation-driven approach to cloning the human ORFeome". Genome Biol. 5 (10): R84. doi:10.1186/gb-2004-5-10-r84. PMC 545604. PMID 15461802.
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.
Mackay DS, Boskovska OB, Knopf HL, et al. (2003). "A nonsense mutation in CRYBB1 associated with autosomal dominant cataract linked to human chromosome 22q". Am. J. Hum. Genet. 71 (5): 1216–21. doi:10.1086/344212. PMC 385100. PMID 12360425.
MacCoss MJ, McDonald WH, Saraf A, et al. (2002). "Shotgun identification of protein modifications from protein complexes and lens tissue". Proc. Natl. Acad. Sci. U.S.A. 99 (12): 7900–5. Bibcode:2002PNAS...99.7900M. doi:10.1073/pnas.122231399. PMC 122992. PMID 12060738.
Dunham I, Shimizu N, Roe BA, et al. (1999). "The DNA sequence of human chromosome 22". Nature. 402 (6761): 489–95. Bibcode:1999Natur.402..489D. doi:10.1038/990031. PMID 10591208.
Bonaldo MF, Lennon G, Soares MB (1997). "Normalization and subtraction: two approaches to facilitate gene discovery". Genome Res. 6 (9): 791–806. doi:10.1101/gr.6.9.791. PMID 8889548.
David LL, Shearer TR, Shih M (1993). "Sequence analysis of lens beta-crystallins suggests involvement of calpain in cataract formation". J. Biol. Chem. 268 (3): 1937–40. doi:10.1016/S0021-9258(18)53944-2. PMID 8420967.
Bijlsma EK, Delattre O, Juyn JA, et al. (1994). "Regional fine mapping of the beta crystallin genes on chromosome 22 excludes these genes as physically linked markers for neurofibromatosis type 2". Genes Chromosomes Cancer. 8 (2): 112–8. doi:10.1002/gcc.2870080208. PMID 7504514. S2CID 31532867.
van Rens GL, Geurts van Kessel AH, Bloemendal H (1992). "Localization of the beta A4-crystallin gene (CRYBA4) on human chromosome 22 in the region q11.2→q13.1". Cytogenet. Cell Genet. 61 (3): 180–3. doi:10.1159/000133403. PMID 1424806.

This article on a gene on human chromosome 22 is a stub. You can help Wikipedia by expanding it.

[refGRCh38Ensembl-1] GRCh38: Ensembl release 89: ENSG00000196431 – Ensembl, May 2017

[refGRCm38Ensembl-2] GRCm38: Ensembl release 89: ENSMUSG00000066975 – 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.

[pmid8999933-5] Lampi KJ, Ma Z, Shih M, Shearer TR, Smith JB, Smith DL, David LL (Feb 1997). "Sequence analysis of betaA3, betaB3, and betaA4 crystallins completes the identification of the major proteins in young human lens". J Biol Chem. 272 (4): 2268–75. doi:10.1074/jbc.272.4.2268. PMID 8999933.

[pmid960806-6] Schuschke G, Mielke U, Bodamer S, Rosenkranz M (Oct 1976). "[Feral domestic pigeons as a hygienic problem in big cities--the situation in Magdeburg]". Z Gesamte Hyg. 22 (1): 30–4. PMID 960806.

[entrez-7] "Entrez Gene: CRYBA4 crystallin, beta A4".

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References

External links

Further reading