STRINGSTRING
STRING protein interaction network
Nodes:
Network nodes represent proteins
splice isoforms or post-translational modifications are collapsed, i.e. each node represents all the proteins produced by a single, protein-coding gene locus.
Node Color
colored nodes:
query proteins and first shell of interactors
white nodes:
second shell of interactors
Node Content
empty nodes:
proteins of unknown 3D structure
filled nodes:
a 3D structure is known or predicted
Edges:
Edges represent protein-protein associations
associations are meant to be specific and meaningful, i.e. proteins jointly contribute to a shared function; this does not necessarily mean they are physically binding to each other.
Known Interactions
from curated databases
experimentally determined
Predicted Interactions
gene neighborhood
gene fusions
gene co-occurrence
Others
textmining
co-expression
protein homology
Your Input:
Neighborhood
Gene Fusion
Cooccurrence
Coexpression
Experiments
Databases
Textmining
[Homology]
Score
CpnCalphotin (Cpn) encodes a glutamic acid-rich protein with a strong negative charge and a highly hydrophobic amino acid composition. It functions as an immobile Ca[2+] buffer along the base of the photoreceptor's microvilli. It protects the photoreceptor cells from Ca[2+] overload and light induced degeneration. (864 aa)    
Predicted Functional Partners:
trpl
Transient-receptor-potential-like protein; A light-sensitive calcium channel that is required for inositide-mediated Ca(2+) entry in the retina during phospholipase C (PLC)-mediated phototransduction. Required for vision in the dark and in dim light. Binds calmodulin. Trp and trpl act together in the light response, although it is unclear whether as heteromultimers or distinct units. Also forms a functional cation channel with Trpgamma. Activated by fatty acids, metabolic stress, inositols and GTP-binding proteins.
   
  
 0.874
inaD
Inactivation-no-after-potential D protein; Involved in the negative feedback regulation of the light- activated signaling cascade in photoreceptors through a calcium- mediated process. Interacts with tetrapeptide ligand located in C- terminal sequence of 3 key components of the visual cascade, tethering them and forming a macromolecular signaling phototransduction complex.
   
 
 0.873
Rh3
Rhodopsin 3 (Rh3) encodes a Rhodopsin GPCR protein that responds to UV light and activates the phototransduction cascade that leads to photoreceptor depolarization. Rh3 is expressed in R7 photoreceptors in a stochastic manner: 35% of R7 photoreceptors express Rh3 while the remaining 65% express another UV-sensitive Rhodopsin encoded by Rh4.
   
 
 0.858
Gbeta76C
Guanine nucleotide-binding protein subunit beta-2; G protein beta-subunit 76C (Gbeta76C) encodes a protein that forms a Gbeta-gamma complex that is anchored to the plasma membrane via lipid modification of the gamma-subunit. The Gbeta-gamma complex plays an essential role in phototransduction by presenting the Gqalpha-subunit to rhodopsin GPCRs for efficient activation, and preventing spontaneous GDP-GTP exchange on the Gqalpha-subunit.
   
 
 0.853
Arr2
Phosrestin-1; Arrestin 2 (Arr2) encodes a protein involved in rhodopsin inactivation that contributes to photoreceptor maintenance and smell and sound perception.
   
 
 0.846
ninaE
Opsin Rh1; Neither inactivation nor afterpotential E (ninaE) encodes a protein that plays a major role in light detection and vision. It is the rhodopsin expressed in the largest class of photoreceptors in the adult retina. The stimulation by light of the product of ninaE induces G-protein signaling activation, the opening of the channels encoded by trp and trpl and photoreceptor cell membrane depolarization.
   
 
 0.840
trp
Transient receptor potential protein; A light-sensitive calcium channel that is required for inositide-mediated Ca(2+) entry in the retina during phospholipase C (PLC)-mediated phototransduction. Ca(2+) influx may then feed back and inhibit PLC, thereby facilitating phosphatidylinositol 4,5 bisphosphate (PIP2) recycling. Trp and trpl act together in the light response, though it is unclear whether as heteromultimers or as distinct units, and are activated by fatty acids and metabolic stress. Also required for olfactory adaptation and may be involved in olfactory system development. Bel [...]
   
    0.803
ninaA
Peptidyl-prolyl cis-trans isomerase, rhodopsin-specific isozyme; PPIases accelerate the folding of proteins. It catalyzes the cis-trans isomerization of proline imidic peptide bonds in oligopeptides. Acts on the folding of rhodopsin RH1 and RH2 (but not RH3) and is required for visual transduction. Belongs to the cyclophilin-type PPIase family.
   
 
 0.797
inaC
Protein kinase C, eye isozyme; This is a calcium-activated, phospholipid-dependent, serine- and threonine-specific enzyme. This isozyme is a negative regulator of the visual transduction cascade and has been shown to be required for photoreceptor cell inactivation and light adaptation. Negative regulation is dependent on interaction with scaffolding protein inaD. Acts in a hh-signaling pathway which regulates the Duox- dependent gut immune response to bacterial uracil; required for the activation of Cad99C and consequently Cad99C-dependent endosome formation, which is essential for the [...]
   
  
 0.738
Pdh
Photoreceptor dehydrogenase (Pdh) encodes a retinal pigment cell dehydrogenase involved in retinol metabolism; Belongs to the short-chain dehydrogenases/reductases (SDR) family.
   
   0.708
Your Current Organism:
Drosophila melanogaster
NCBI taxonomy Id: 7227
Other names: D. melanogaster, Diptera sp. DNAS-2A9-224646, Sophophora melanogaster, fruit fly
Server load: low (34%) [HD]