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  • 11.0 [archived version]
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MRPS18A MRPS18A GABRB1 GABRB1 STK38L STK38L SYNE3 SYNE3 ANKRD37 ANKRD37 SPAG4 SPAG4 SYNE4 SYNE4 SEPT12 SEPT12 ODF1 ODF1 SPARC SPARC CATSPER4 CATSPER4
"SPAG4" - Sperm-associated antigen 4 protein in Homo sapiens
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query proteins and first shell of interactors
white nodes:
second shell of interactors
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proteins of unknown 3D structure
filled nodes:
some 3D structure is known or predicted
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Known Interactions
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experimentally determined
Predicted Interactions
gene neighborhood
gene fusions
gene co-occurrence
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textmining
co-expression
protein homology
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SPAG4Sperm-associated antigen 4 protein; Involved in spermatogenesis. Required for sperm head formation but not required to establish and maintain general polarity of the sperm head. Required for anchoring and organization of the manchette. Required for targeting of SUN3 and probably SYNE1 through a probable SUN1-SYNE3 LINC complex to the nuclear envelope and involved in accurate posterior sperm head localization of the complex. May anchor SUN3 the nuclear envelope. Involved in maintenance of the nuclear envelope integrity. May assist the organization and assembly of outer dense fibers (ODF [...] (437 aa)    
Predicted Functional Partners:
ODF1
Outer dense fiber protein 1; Component of the outer dense fibers (ODF) of spermatozoa. ODF are filamentous structures located on the outside of the axoneme in the midpiece and principal piece of the mammalian sperm tail and may help to maintain the passive elastic structures and elastic recoil of the sperm tail; Small heat shock proteins (250 aa)
     
 
  0.953
SEPT12
Septin-12; Filament-forming cytoskeletal GTPase (By similarity). Involved in spermatogenesis. Involved in the morphogenesis of sperm heads and the elongation of sperm tails probably implicating the association with alpha- and beta-tubulins. Forms a filamentous structure with SEPT7, SEPT6, SEPT2 and probably SEPT4 at the sperm annulus which is required for the structural integrity and motility of the sperm tail during postmeiotic differentiation. May play a role in cytokinesis (Potential); Belongs to the TRAFAC class TrmE-Era-EngA-EngB-Septin- like GTPase superfamily. Septin GTPase family (358 aa)
     
 
  0.851
GABRB1
Gamma-aminobutyric acid receptor subunit beta-1; Component of the heteropentameric receptor for GABA, the major inhibitory neurotransmitter in the vertebrate brain. Functions also as histamine receptor and mediates cellular responses to histamine. Functions as receptor for diazepines and various anesthetics, such as pentobarbital; these are bound at a separate allosteric effector binding site. Functions as ligand- gated chloride channel; Gamma-aminobutyric acid type A receptor subunits (474 aa)
     
   
  0.681
CATSPER4
Cation channel sperm-associated protein 4; Voltage-gated calcium channel that plays a central role in calcium-dependent physiological responses essential for successful fertilization, such as sperm hyperactivation, acrosome reaction and chemotaxis towards the oocyte; Belongs to the cation channel sperm-associated (TC 1.A.1.19) family (472 aa)
           
  0.674
SYNE3
Nesprin-3; As a component of the LINC (LInker of Nucleoskeleton and Cytoskeleton) complex involved in the connection between the nuclear lamina and the cytoskeleton. The nucleocytoplasmic interactions established by the LINC complex play an important role in the transmission of mechanical forces across the nuclear envelope and in nuclear movement and positioning. Probable anchoring protein which tethers the nucleus to the cytoskeleton by binding PLEC which can associate with the intermediate filament system. Plays a role in the regulation of aortic epithelial cell morphology, and is re [...] (975 aa)
       
 
  0.641
MRPS18A
Mitochondrial ribosomal protein S18A; Belongs to the bacterial ribosomal protein bS18 family. Mitochondrion-specific ribosomal protein mL66 subfamily (196 aa)
           
  0.636
SPARC
SPARC; Appears to regulate cell growth through interactions with the extracellular matrix and cytokines. Binds calcium and copper, several types of collagen, albumin, thrombospondin, PDGF and cell membranes. There are two calcium binding sites; an acidic domain that binds 5 to 8 Ca(2+) with a low affinity and an EF-hand loop that binds a Ca(2+) ion with a high affinity; SPARC family (303 aa)
           
  0.633
ANKRD37
Ankyrin repeat domain-containing protein 37; Ankyrin repeat domain containing (158 aa)
     
   
  0.607
STK38L
Serine/threonine-protein kinase 38-like; Involved in the regulation of structural processes in differentiating and mature neuronal cells (464 aa)
           
  0.597
SYNE4
Nesprin-4; As a component of the LINC (LInker of Nucleoskeleton and Cytoskeleton) complex, involved in the connection between the nuclear lamina and the cytoskeleton. The nucleocytoplasmic interactions established by the LINC complex play an important role in the transmission of mechanical forces across the nuclear envelope and in nuclear movement and positioning (By similarity). Behaves as a kinesin cargo, providing a functional binding site for kinesin-1 at the nuclear envelope. Hence may contribute to the establishment of secretory epithelial morphology by promoting kinesin-dependen [...] (404 aa)
           
  0.588
Your Current Organism:
Homo sapiens
NCBI taxonomy Id: 9606
Other names: H. sapiens, Homo sapiens, human, man
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