Cysteine-rich secretory protein

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Crisp domain (CRD)
CAP-like PR-1 domain in white. ShK-like CRD in red. Disulphides in yellow. Glycan chains not shown. (PDB: 1WVR​)
Identifiers
SymbolCrisp
PfamPF08562
Pfam clanCL0213
InterProIPR013871
Available protein structures:
Pfam  structures / ECOD  
PDBRCSB PDB; PDBe; PDBj
PDBsumstructure summary

Cysteine-rich secretory proteins, often abbreviated as CRISPs, are a group of

cyclic nucleotide-gated ion channels.[4]

Structure

CRISPs contain two

CAP-like 'Pathogenesis-related 1' domain (PR-1), followed by the smaller ShK-like 'Cysteine-Rich Domain' (CRD).[1]

CRISPs are

disulfide bonds, particularly in the hinge region and CRD.[1]

Mammalian reproduction

CRISPs are found in the

seminal fluid, excreted from the prostate although its function is unknown.[3]

During

contraceptives are being actively investigated.[3]

Snake venom

Ophiophagus hannah) for which the CRISP ophanin
is named

CRISPs are found in the

cyclic nucleotide-gated ion channels. One of the N. haje CRISPs was the first example of an acidic CRISP in reptilian venom. The selective ion channel activity of snake CRISPs, coupled with the variety of CRISPs available as the pool of venom proteins appears highly variable between (at least) cobra species, provide a valuable tool for probing the mechanisms of ion channel activity.[9]

References