CRYBB1

Crystallin, beta B1
PDB rendering based on 1oki.
Available structures PDB Ortholog search: PDBe, RCSB List of PDB id codes 1OKI​
Identifiers
Symbols	CRYBB1 ; CATCN3; CTRCT17
External IDs	OMIM: 600929 MGI: 104992 HomoloGene: 1423 GeneCards: CRYBB1 Gene
Gene ontology Molecular function • structural constituent of eye lens • protein binding Biological process • visual perception Sources: Amigo / QuickGO
RNA expression pattern
More reference expression data
Orthologs
Species	Human	Mouse
Entrez	1414	12960
Ensembl	ENSG00000100122	ENSMUSG00000029343
UniProt	P53674	Q9WVJ5
RefSeq (mRNA)	NM_001887	NM_023695
RefSeq (protein)	NP_001878	NP_076184
Location (UCSC)	Chr 22: 26.6 – 26.62 Mb	Chr 5: 112.26 – 112.27 Mb
PubMed search

Beta-crystallin B1 is a protein that in humans is encoded by the CRYBB1 gene.^[1][2][3]

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 basic group member, undergoes extensive cleavage at its N-terminal extension during lens maturation. It is also a member of a gene cluster with beta-A4, beta-B2, and beta-B3.^[3]

References

1. Hulsebos TJ, Gilbert DJ, Delattre O, Smink LJ, Dunham I, Westerveld A, Thomas G, Jenkins NA, Copeland NG (Mar 1996). "Assignment of the beta B1 crystallin gene (CRYBB1) to human chromosome 22 and mouse chromosome 5". Genomics 29 (3): 712–8. doi:10.1006/geno.1995.9947. PMID 8575764.
2. Mackay DS, Boskovska OB, Knopf HL, Lampi KJ, Shiels A (Oct 2002). "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.
3. "Entrez Gene: CRYBB1 crystallin, beta B1".

Further reading

• David LL, Lampi KJ, Lund AL, Smith JB (1996). "The sequence of human betaB1-crystallin cDNA allows mass spectrometric detection of betaB1 protein missing portions of its N-terminal extension". J. Biol. Chem. 271 (8): 4273–9. doi:10.1074/jbc.271.8.4273. PMID 8626774.
• Lampi KJ; Ma Z; Hanson SR; et al. (1998). "Age-related changes in human lens crystallins identified by two-dimensional electrophoresis and mass spectrometry". Exp. Eye Res. 67 (1): 31–43. doi:10.1006/exer.1998.0481. PMID 9702176.
• Dunham I; Shimizu N; Roe BA; et al. (1999). "The DNA sequence of human chromosome 22". Nature 402 (6761): 489–95. doi:10.1038/990031. PMID 10591208.
• 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. doi:10.1073/pnas.122231399. PMC 122992. PMID 12060738.
• 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. doi:10.1073/pnas.242603899. PMC 139241. PMID 12477932.
• Stempel D; Sandusky H; Lampi K; et al. (2003). "BetaB1-crystallin: identification of a candidate ciliary body uveitis antigen". Invest. Ophthalmol. Vis. Sci. 44 (1): 203–9. doi:10.1167/iovs.01-1261. PMID 12506076.
• Babenko AP, Bryan J (2004). "Sur domains that associate with and gate KATP pores define a novel gatekeeper". J. Biol. Chem. 278 (43): 41577–80. doi:10.1074/jbc.C300363200. PMID 12941953.
• Van Montfort RL, Bateman OA, Lubsen NH, Slingsby C (2004). "Crystal structure of truncated human betaB1-crystallin". Protein Sci. 12 (11): 2606–12. doi:10.1110/ps.03265903. PMC 2366963. PMID 14573871.
• Harms MJ; Wilmarth PA; Kapfer DM; et al. (2004). "Laser light-scattering evidence for an altered association of beta B1-crystallin deamidated in the connecting peptide". Protein Sci. 13 (3): 678–86. doi:10.1110/ps.03427504. PMC 2286738. PMID 14978307.
• 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.
• 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.
• Annunziata O; Pande A; Pande J; et al. (2005). "Oligomerization and phase transitions in aqueous solutions of native and truncated human beta B1-crystallin". Biochemistry 44 (4): 1316–28. doi:10.1021/bi048419f. PMID 15667225.
• Willoughby CE; Shafiq A; Ferrini W; et al. (2006). "CRYBB1 mutation associated with congenital cataract and microcornea". Mol. Vis. 11: 587–93. PMID 16110300.
• Hou HH, Kuo MY, Luo YW, Chang BE (2006). "Recapitulation of human betaB1-crystallin promoter activity in transgenic zebrafish". Dev. Dyn. 235 (2): 435–43. doi:10.1002/dvdy.20652. PMID 16331646.
• Smith MA, Bateman OA, Jaenicke R, Slingsby C (2007). "Mutation of interfaces in domain-swapped human betaB2-crystallin". Protein Sci. 16 (4): 615–25. doi:10.1110/ps.062659107. PMC 2203347. PMID 17327390.
• Koteiche HA, Kumar MS, McHaourab HS (2007). "Analysis of betaB1-crystallin unfolding equilibrium by spin and fluorescence labeling: evidence of a dimeric intermediate". FEBS Lett. 581 (10): 1933–8. doi:10.1016/j.febslet.2007.04.004. PMC 2394508. PMID 17448466.
• Cohen D; Bar-Yosef U; Levy J; et al. (2007). "Homozygous CRYBB1 deletion mutation underlies autosomal recessive congenital cataract". Invest. Ophthalmol. Vis. Sci. 48 (5): 2208–13. doi:10.1167/iovs.06-1019. PMID 17460281.
• Wang J; Ma X; Gu F; et al. (2007). "A missense mutation S228P in the CRYBB1 gene causes autosomal dominant congenital cataract". Chin. Med. J. 120 (9): 820–4. PMID 17531125.