TCDB is operated by the Saier Lab Bioinformatics Group
TCIDNameDomainKingdom/PhylumProtein(s)
8.A.85.1.1









Heat-stable enterotoxin receptor, STAR, of 1073 aas and 2 or 3 TMSs, also called GUCY2C or GUC2C.  It is the receptor for the E. coli heat-stable enterotoxin, STa. STAR is expressed primarily on intestinal epithelial cells and STa markedly stimulates the accumulation of cGMP in  cells expressing guanyl cyclase-C which is also activated by the endogenous peptides guanylin and uroguanylin. Activation initiates salt and water movement in the intestine. STa, deregulates this pathway and causes secretory diarrhea. (Steinbrecher 2014).

Eukaryota
Metazoa
STAR of Homo sapiens
8.A.85.1.2









Atrial natriurentic peptide receptor of 1047 aas, NPR2, ANPRB, of 1047 aas and probably 2 - 3 TMSs.  Receptor for the C-type natriuretic peptide NPPC/CNP hormone. It has guanylate cyclase activity upon binding of its ligand. May play a role in the regulation of skeletal growth.  Mutations cause dwarfism (Dickey et al. 2016).

Eukaryota
Metazoa
NPR2 of Homo sapiens
8.A.85.1.3









Retinal guanylate cyclase 1, GUCY2D, CORD6, GUC1A4, GUC2D, RETGC, RETGC1, OF 1103 aas.  Mutations cause autosomal dominant cone-rod dystrophy (Smith et al. 2007).

Eukaryota
Metazoa
GC2D of Homo sapiens
8.A.85.1.4









Putative adenylate cyclase, CyaA, of 609 aas and 3 putative TMSs.

Bacteria
Proteobacteria
CyaA of Bdellovibrio bacteriovorus
8.A.85.1.5









Putative adenylyl cyclase class-3/4/guanylyl cyclase of 500 aas and 4 TMSs near the N-terminus of the protein.

Bacteria
Proteobacteria
Adenylyl cyclase of Marinobacter hydrocarbonoclasticus
8.A.85.1.6









Natriuretic peptide receptor 1, NPR1 or ANPRA, of 1061 aas and one N-terminal TMS.  It is the receptor for the atrial natriuretic peptide NPPA/ANP and the brain natriuretic peptide NPPB/BNP which are potent vasoactive hormones playing a key role in cardiovascular homeostasis. It has guanylate cyclase activity upon binding of the ligand (Koller et al. 1991). Natriuretic peptides relax human intrarenal arteries through natriuretic peptide receptor type-A recapitulated by soluble guanylyl cyclase agonists (Frees et al. 2020).

 

Eukaryota
Opisthokonta
NPR1 of Homo sapiens
8.A.85.1.7









Uncharacterized protein of 787 aas and 1 (N-terminus) + 1 (at residue 350) + 1 - 3 TMSs (at residues 400 - 470) followed by a hydrophilic domain that is homologous to other members of this family.  The first 470 aas are not homologous to other members if this family.

Bacteria
Proteobacteria
UP of Pelagibacteraceae bacterium TMED13 (marine metagenome)
8.A.85.1.8









Putative K+ channel, ACα, of 669 aas with two very hydrophobic putative TMSs following by 3 weakly hydrophone potential TMSs.

Eukaryota
Sar
ACα of Plasmodium falciparum
8.A.85.2.1









Putative adenylate cyclase, CyaC of 483 aas and 6 - 8 TMSs with a 6 TMS N-terminal domain.

Bacteria
Proteobacteria
CyaC of Bdellovibrio exovorus
8.A.85.3.1









Adenylate cyclase with N-terminal 6 TMS domain of 571 aas.

Bacteria
Proteobacteria
Cya of Desulfobacterium autotrophicum
8.A.85.3.2









Metal-dependent phosphohydrolase of 428 aas and 6 N-terminal TMSs.

Bacteria
Proteobacteria
Phosphohydrolase of Shewanella loihica
8.A.85.3.3









Uncharacterized HD domain-containing protein of 799 aas and 7 N-terminal TMSs.

Bacteria
Firmicutes
UP of Butyrivibrio sp. CB08
8.A.85.9.5









Uncharacterized membrane protein YgaE (UPF0421/DUF939 family) of 410 aas and 5 or  6 N-terminal TM

Bacteria
Terrabacteria group
UP of Micromonospora echinospora