BFSP2

BFSP2
Identifiers
Aliases	BFSP2 , CP47, CP49, CTRCT12, LIFL-L, PHAKOSIN, beaded filament structural protein 2
External IDs	OMIM: 603212; MGI: 1333828; HomoloGene: 20791; GeneCards: BFSP2; OMA:BFSP2 - orthologs
Gene location (Human)
Chr.	Chromosome 3 (human)
End	133,475,222 bp
Gene location (Mouse)
Chr.	Chromosome 9 (mouse)
End	103,357,619 bp
RNA expression pattern
	Top expressed in
	lens; ; testicle; ; gonad; ; lymph node; ; spleen; ; granulocyte; ; appendix; ; mucosa of transverse colon; ; bone marrow cells; ; rectum;
	Top expressed in
	lens; ; epithelium of lens; ; iris; ; ciliary body; ; retinal pigment epithelium; ; Jacobson's organ; ; sciatic nerve; ; embryo; ; embryo; ; facial motor nucleus;
	More reference expression data
	More reference expression data
Gene ontology
Molecular function	structural constituent of cytoskeleton ; protein binding ; structural molecule activity ; structural constituent of eye lens ;
Cellular component	cell cortex ; intermediate filament ; cytoskeleton ; membrane ; cytoplasm ; plasma membrane ;
Biological process	cell maturation ; cytoskeleton organization ; lens fiber cell development ; response to stimulus ; visual perception ; intermediate filament cytoskeleton organization ;
	Sources:Amigo / QuickGO
Orthologs
	8419
	107993
	ENSG00000170819
	ENSMUSG00000032556
	Q13515
	Q6NVD9
	NM_003571
	NM_001002896 ; NM_001364514
	NP_003562
	NP_001002896 ; NP_001351443
	Wikidata
View/Edit Human	View/Edit Mouse

Last updated January 30, 2025

BFSP2 is a gene that encodes the protein phakinin ("beaded filament structural protein 2") in humans.^[5]

More than 99% of the vertebrate ocular lens consists of terminally differentiated lens fiber cells. Two lens-specific intermediate filament proteins, the protein product of this gene (CP49 or phakinin) and filensin (also known as CP115), are expressed only after fiber cell differentiation has begun. Both proteins are found in a structurally unique cytoskeletal element that is referred to as the beaded filament (BF). Mutations in this gene have been associated with juvenile-onset, progressive cataracts and Dowling-Meara epidermolysis bullosa simplex.^[5]

The two BFSP proteins are put into a "type VI" of intermediate filament (IF) classification. Unlike other IFs that form unbranched links, the two proteins form a network of filaments together with CRYAA.^[6]^[7]

Related Research Articles

Intermediate filaments (IFs) are cytoskeletal structural components found in the cells of vertebrates, and many invertebrates. Homologues of the IF protein have been noted in an invertebrate, the cephalochordate Branchiostoma.

Gamma-crystallin D is a protein that in humans is encoded by the CRYGD gene.

Cone-rod homeobox protein is a protein that in humans is encoded by the CRX gene.

Beta-crystallin B2 is a protein that in humans is encoded by the CRYBB2 gene.

Crystallin, gamma C, also known as CRYGC, is a protein which in humans is encoded by the CRYGC gene.

Transcription factor Maf, also known as proto-oncogene c-Maf or V-maf musculoaponeurotic fibrosarcoma oncogene homolog, is a transcription factor that in humans is encoded by the MAF gene.

Gap junction alpha-3 protein is a protein that in humans is encoded by the GJA3 gene.

Beta-crystallin B1 is a protein that in humans is encoded by the CRYBB1 gene. Variants in CRYBB1 are associated with autosomal dominant congenital cataract.

Gamma-crystallin B is a protein that in humans is encoded by the CRYGB gene.

Beta-crystallin A3 is a protein that in humans is encoded by the CRYBA1 gene.

Gap junction alpha-8 protein is a protein that in humans is encoded by the GJA8 gene. It is also known as connexin 50.

Heat shock factor protein 4 is a protein that in humans is encoded by the HSF4 gene.

BFSP1 is a gene that encodes the protein filensin in humans.

Beta-crystallin A4 is a protein that in humans is encoded by the CRYBA4 gene.

Beta-crystallin B3 is a protein that in humans is encoded by the CRYBB3 gene.

Gamma-crystallin A is a protein that in humans is encoded by the CRYGA gene.

Pituitary homeobox 3 is a protein that in humans is encoded by the PITX3 gene.

Alpha-crystallin A chain is a protein that in humans is encoded by the CRYAA gene.

Forkhead box protein E3 (FOXE3) also known as forkhead-related transcription factor 8 (FREAC-8) is a protein that in humans is encoded by the FOXE3 gene located on the short arm of chromosome 1.

Acetyl-coenzyme A transporter 1 also known as solute carrier family 33 member 1 (SLC33A1) is a protein that in humans is encoded by the SLC33A1 gene.

References

1 2 3 GRCh38: Ensembl release 89: ENSG00000170819 – Ensembl, May 2017
1 2 3 GRCm38: Ensembl release 89: ENSMUSG00000032556 – 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.
1 2 "Entrez Gene: BFSP2 beaded filament structural protein 2, phakinin".
↑ Chaves JM, Gupta R, Srivastava K, Srivastava O (December 2017). "Human alpha A-crystallin missing N-terminal domain poorly complexes with filensin and phakinin". Biochemical and Biophysical Research Communications. 494 (1–2): 402–408. doi:10.1016/j.bbrc.2017.09.088. PMID 28935373.
↑ Szeverenyi I, Cassidy AJ, Chung CW, Lee BT, Common JE, Ogg SC, Chen H, Sim SY, Goh WL, Ng KW, Simpson JA, Chee LL, Eng GH, Li B, Lunny DP, Chuon D, Venkatesh A, Khoo KH, McLean WH, Lim YP, Lane EB. "Human Intermediate Filament Database".Szeverenyi I, Cassidy AJ, Chung CW, Lee BT, Common JE, Ogg SC, et al. (March 2008). "The Human Intermediate Filament Database: comprehensive information on a gene family involved in many human diseases". Human Mutation. 29 (3): 351–360. doi: 10.1002/humu.20652 . PMID 18033728. S2CID 20760837.

External links

Human BFSP2 genome location and BFSP2 gene details page in the UCSC Genome Browser .

Merdes A, Gounari F, Georgatos SD (December 1993). "The 47-kD lens-specific protein phakinin is a tailless intermediate filament protein and an assembly partner of filensin". The Journal of Cell Biology. 123 (6 Pt 1): 1507–1516. doi:10.1083/jcb.123.6.1507. PMC 2290875 . PMID 7504675.
Hess JF, Casselman JT, FitzGerald PG (January 1995). "Chromosomal locations of the genes for the beaded filament proteins CP 115 and CP 47". Current Eye Research. 14 (1): 11–18. doi:10.3109/02713689508999909. PMID 7720401.
Hess JF, Casselman JT, FitzGerald PG (March 1996). "Gene structure and cDNA sequence identify the beaded filament protein CP49 as a highly divergent type I intermediate filament protein". The Journal of Biological Chemistry. 271 (12): 6729–6735. doi: 10.1074/jbc.271.41.25089 . PMID 8636093.
Bonaldo MF, Lennon G, Soares MB (September 1996). "Normalization and subtraction: two approaches to facilitate gene discovery". Genome Research. 6 (9): 791–806. doi: 10.1101/gr.6.9.791 . PMID 8889548.
Hess JF, Casselman JT, Kong AP, FitzGerald PG (May 1998). "Primary sequence, secondary structure, gene structure, and assembly properties suggests that the lens-specific cytoskeletal protein filensin represents a novel class of intermediate filament protein". Experimental Eye Research. 66 (5): 625–644. doi:10.1006/exer.1998.0478. PMID 9628810.
Conley YP, Erturk D, Keverline A, Mah TS, Keravala A, Barnes LR, et al. (April 2000). "A juvenile-onset, progressive cataract locus on chromosome 3q21-q22 is associated with a missense mutation in the beaded filament structural protein-2". American Journal of Human Genetics. 66 (4): 1426–1431. doi:10.1086/302871. PMC 1288209 . PMID 10729115.
Jakobs PM, Hess JF, FitzGerald PG, Kramer P, Weleber RG, Litt M (April 2000). "Autosomal-dominant congenital cataract associated with a deletion mutation in the human beaded filament protein gene BFSP2". American Journal of Human Genetics. 66 (4): 1432–1436. doi:10.1086/302872. PMC 1288210 . PMID 10739768.
Carter JM, McLean WH, West S, Quinlan RA (April 2000). "Mapping of the human CP49 gene and identification of an intragenic polymorphic marker to allow genetic linkage analysis in autosomal dominant congenital cataract". Biochemical and Biophysical Research Communications. 270 (2): 432–436. doi:10.1006/bbrc.2000.2442. PMID 10753642.
Zhang Q, Guo X, Xiao X, Yi J, Jia X, Hejtmancik JF (November 2004). "Clinical description and genome wide linkage study of Y-sutural cataract and myopia in a Chinese family". Molecular Vision. 10: 890–900. PMID 15570218.
Zhang L, Gao L, Li Z, Qin W, Gao W, Cui X, et al. (December 2006). "Progressive sutural cataract associated with a BFSP2 mutation in a Chinese family". Molecular Vision. 12: 1626–1631. PMID 17200662.
Cui X, Gao L, Jin Y, Zhang Y, Bai J, Feng G, et al. (October 2007). "The E233del mutation in BFSP2 causes a progressive autosomal dominant congenital cataract in a Chinese family". Molecular Vision. 13: 2023–2029. PMID 17982427.

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[refGRCh38Ensembl-1] 1 2 3 GRCh38: Ensembl release 89: ENSG00000170819 – Ensembl, May 2017

[refGRCm38Ensembl-2] 1 2 3 GRCm38: Ensembl release 89: ENSMUSG00000032556 – 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.

[entrez-5] 1 2 "Entrez Gene: BFSP2 beaded filament structural protein 2, phakinin".

[pmid28935373-6] Chaves JM, Gupta R, Srivastava K, Srivastava O (December 2017). "Human alpha A-crystallin missing N-terminal domain poorly complexes with filensin and phakinin". Biochemical and Biophysical Research Communications. 494 (1–2): 402–408. doi:10.1016/j.bbrc.2017.09.088. PMID 28935373.

[interfil-7] Szeverenyi I, Cassidy AJ, Chung CW, Lee BT, Common JE, Ogg SC, Chen H, Sim SY, Goh WL, Ng KW, Simpson JA, Chee LL, Eng GH, Li B, Lunny DP, Chuon D, Venkatesh A, Khoo KH, McLean WH, Lim YP, Lane EB. "Human Intermediate Filament Database".Szeverenyi I, Cassidy AJ, Chung CW, Lee BT, Common JE, Ogg SC, et al. (March 2008). "The Human Intermediate Filament Database: comprehensive information on a gene family involved in many human diseases". Human Mutation. 29 (3): 351–360. doi: 10.1002/humu.20652 . PMID 18033728. S2CID 20760837.

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BFSP2

Contents

Related Research Articles

References

External links

Further reading