Cysteine string proteins (CSPs) are synaptic vesicle-associated, secretory vesicle proteins that are involved in Ca2+-regulated exocytosis of synaptic vesicles and modulation of presynaptic transmembrane calcium fluxes in neuroendocrine and endocrine cell types. CSP contains a J-domain that binds HSP 70/HSC 70 chaperone ATPases and a membrane-targeting, palmitoylated cysteine-rich string region. CSPs may act as molecular chaperones in synapses, and mediate conformational folding of components of the vesicular exocytotic machinery. CSP is involved in the fine tuning of neurotransmission through its interaction with receptor-coupled trimeric GTP binding proteins (G proteins) and N-type Ca2+ channels. Two variants of CSP have been described: CSP1; and the 31 amino acid, C-terminally truncated isoform, CSP2. Subcellular fractionation of insulinoma cells shows CSP1 in granular fractions, while the membrane and cytosol fractions contain predominantly CSP2. The fractions also contain additional proteins, presumably CSP dimers. Furthermore, in various mammalian cell lines (including rat brain) CSP1 expression predominates CSP2 expression.

CLN 4; CLN4; CLN4B; CSP; cysteine string protein alpha; Cysteine string protein; DJC5; DnaJ (Hsp40) homolog subfamily C member 5; DnaJ homolog subfamily C member 5; DNAJC 5; Dnajc5; DNAJC5A; DNJC5_HUMAN; NCL.

Human,Rat,Mouse,Pig,Cow,Horse,Rabbit,Sheep,GuineaPig

IHC,IF,ICC

IHC 1:100-500
IF 1:100-500
ICC 1:100-1:400

22kD

80331

Q9H3Z4

https://www.uniprot.org/uniprotkb/Q9H3Z4

Membrane. Melanosome. Identified by mass spectrometry in melanosome fractions from stage I to stage IV.

Expressed in pancreas, kidney, skeletal muscle, liver, lung, placenta, brain and heart.

KLH conjugated synthetic peptide derived from human CSP

Rabbit

Polyclonal

IgG

affinity purified by Protein A

Liquid

0.01M TBS (pH7.4) with 1% BSA, 0.02% Proclin300 and 50% Glycerol.

Shipped at 4℃. Store at -20℃ for one year. Avoid repeated freeze/thaw cycles.