FB2026_03 , released September 17, 2026
Gene Group: 4-CYSTEINE SOLUBLE PROTEINS
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General Information
Name
4-CYSTEINE SOLUBLE PROTEINS
Species
D. melanogaster
Symbol
4CSP
FlyBase ID
FBgg0002192
Date last reviewed
2026-03-23
Number of members
4
Description
Description
4-cysteine soluble proteins are small proteins found in arthropods that mediate olfactory recognition at the periphery of sensory receptors as well as having non-chemosensory functions. They posses four neighboring cysteine residues that are highly conserved. (Adapted from PMID:41752605.)
Notes on Group
Source Material
The 4-CYSTEINE SOLUBLE PROTEINS Gene Group has been compiled using the following publication(s): Liu et al., 2026, Picimbon, 2026, Picimbon, 2020, Vieira and Rozas, 2011, Vieira et al., 2007, and Zhou et al., 2006 .
Key Gene Ontology (GO) terms
Molecular Function
Biological Process
Cellular Component
extracellular region
Related Gene Groups
Members (4)
For all members:
GO ribbon stack
 molecular functionbiological processcellular component
External Data
Synonyms and Secondary IDs
Synonym(s)
4CSP
SAPs
OS-D
CSPs
4-CYSTEINE SOLUBLE PROTEINS
sensory appendage proteins
olfactory segment-D proteins
chemosensory proteins
Secondary FlyBase ID(s)
References (7)