Molecular weight (DA)
54kD
Immunogen
Synthesized peptide derived from part region of human protein
Specificity
CABYR Polyclonal Antibody detects endogenous levels of protein.
Formulation
Liquid in PBS containing 50% glycerol, and 0.02% sodium azide.
Dilution rate
WB 1:500-2000 ELISA 1:5000-20000
Purification process (Immunogen)
The antibody was affinity-purified from rabbit antiserum by affinity-chromatography using epitope-specific immunogen.
Background
To reach fertilization competence, spermatozoa undergo a series of morphological and molecular maturational processes, termed capacitation, involving protein tyrosine phosphorylation and increased intracellular calcium. The protein encoded by this gene localizes to the principal piece of the sperm flagellum in association with the fibrous sheath and exhibits calcium-binding when phosphorylated during capacitation. A pseudogene on chromosome 3 has been identified for this gene. Alternatively spliced transcript variants encoding distinct protein isoforms have been found for this gene. [provided by RefSeq, Jul 2013],
Function
function:May function as a regulator of both motility- and head-associated functions such as capacitation and the acrosome reaction. Isoform 1 binds calcium in vitro. Isoform 2 and isoform 6 probably bind calcium. Isoform 3 and isoform 5 do not bind calcium in vitro. Isoform 4 probably does not bind calcium.,PTM:Isoform 1 is phosphorylated on tyrosine residues during in vitro capacitation. Isoform 3 and isoform 5 are phosphorylated by GSK3B in vitro. Dephosphorylation affects its ability to bind calcium.,similarity:Contains 1 RIIa domain.,subcellular location:According to PubMed:15752768, isoform 1, isoform 3 and isoform 5 are both nuclear and cytoplasmic.,subcellular location:According to Ref.4, isoform 1, isoform 3 and isoform 5 are both nuclear and cytoplasmic.,subcellular location:Localized to fibrous sheath including the surface of the longitudinal columns and ribs of the principal
Gene Name
CABYR CBP86 FSP2
Protein name
Calcium-binding tyrosine phosphorylation-regulated protein (Calcium-binding protein 86) (Cancer/testis antigen 88) (CT88) (Fibrousheathin II) (Fibrousheathin-2) (FSP-2) (Testis-specific calcium-bindin
Human protein sequence Database
O75952
Mouse protein sequence database
Q9D424
Rat protein sequence database
Cellular localization
Cytoplasm, cytoskeleton. Cell projection, cilium, flagellum. Localized to fibrous sheath including the surface of the longitudinal columns and ribs of the principal piece of sperm flagella.; [Isoform 1]: Nucleus. Cytoplasm. Cell projection, cilium, flagellum. According to PubMed:15752768, isoform 1, isoform 3 and isoform 5 are both nuclear and cytoplasmic.; [Isoform 3]: Nucleus. Cytoplasm. Cell projection, cilium, flagellum. According to PubMed:15752768, isoform 1, isoform 3 and isoform 5 are both nuclear and cytoplasmic.; [Isoform 5]: Nucleus. Cytoplasm. Cell projection, cilium, flagellum. According to PubMed:15752768, isoform 1, isoform 3 and isoform 5 are both nuclear and cytoplasmic.
Tissue expression
Expressed in elongating spermatids and spermatozoa (at protein level). Isoform 1 is expressed in testis. Isoform 3 and isoform 5 are also expressed in brain, pancreas and numerous brain tumors.
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