Annotations: 8GHP

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	V-set	e8ghpA1	A: a/b three-layered sandwiches	X: RNase A-like	H: RNase A-like	T: RNase A-like	F: V-set	ECOD (v294.1)
B [auth H]	Glyco_hydro_43	e8ghpH1	A: a/b three-layered sandwiches	X: RNase A-like	H: RNase A-like	T: RNase A-like	F: Glyco_hydro_43	ECOD (v294.1)
C [auth L]	Glyco_hydro_43	e8ghpL1	A: a/b three-layered sandwiches	X: RNase A-like	H: RNase A-like	T: RNase A-like	F: Glyco_hydro_43	ECOD (v294.1)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
B [auth H]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (utative)
C [auth L]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (utative)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
B [auth H]	Heavy Chain	IGHV3	-	guanylyl cyclase c	SAbDab (2026-04-10)
C [auth L]	Light Chain	IGKV1	Kappa	guanylyl cyclase c	SAbDab (2026-04-10)

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	Guanylyl cyclase C	binding adenyl ribonucleotide binding nucleotide binding purine ribonucleotide binding purine ribonucleoside triphosphate binding nucleoside phosphate binding ion binding purine nucleotide binding anion binding adenyl nucleotide binding ATP binding heterocyclic compound binding carbohydrate derivative binding ribonucleotide binding binding adenyl ribonucleotide binding nucleotide binding purine ribonucleotide binding purine ribonucleoside triphosphate binding nucleoside phosphate binding ion binding purine nucleotide binding anion binding adenyl nucleotide binding ATP binding heterocyclic compound binding carbohydrate derivative binding ribonucleotide binding small molecule binding catalytic activity, acting on a protein kinase activity protein kinase activity transferase activity catalytic activity phosphotransferase activity, alcohol group as acceptor transferase activity, transferring phosphorus-containing groups peptide receptor activity molecular transducer activity signaling receptor activity toxic substance binding phosphorus-oxygen lyase activity cyclase activity lyase activity guanylate cyclase activity guanyl nucleotide binding GTP binding guanyl ribonucleotide binding	regulation of biological process cell population proliferation regulation of cellular process regulation of cell population proliferation biological regulation cellular process ribose phosphate metabolic process nucleotide biosynthetic process carbohydrate derivative metabolic process purine ribonucleotide biosynthetic process cyclic nucleotide metabolic process nucleobase-containing compound metabolic process ribonucleotide biosynthetic process purine nucleotide metabolic process regulation of biological process cell population proliferation regulation of cellular process regulation of cell population proliferation biological regulation cellular process ribose phosphate metabolic process nucleotide biosynthetic process carbohydrate derivative metabolic process purine ribonucleotide biosynthetic process cyclic nucleotide metabolic process nucleobase-containing compound metabolic process ribonucleotide biosynthetic process purine nucleotide metabolic process ribonucleotide metabolic process nucleobase-containing small molecule metabolic process purine-containing compound biosynthetic process cyclic nucleotide biosynthetic process phosphate-containing compound metabolic process small molecule metabolic process phosphorus metabolic process ribose phosphate biosynthetic process nucleoside phosphate metabolic process carbohydrate derivative biosynthetic process cyclic purine nucleotide metabolic process primary metabolic process nucleotide metabolic process nucleobase-containing compound biosynthetic process purine-containing compound metabolic process biosynthetic process cGMP metabolic process organophosphate metabolic process organophosphate biosynthetic process nucleoside phosphate biosynthetic process metabolic process purine ribonucleotide metabolic process cGMP biosynthetic process purine nucleotide biosynthetic process cellular response to stimulus response to stimulus signaling signal transduction intracellular signal transduction cell communication cell surface receptor signaling pathway receptor guanylyl cyclase signaling pathway enzyme-linked receptor protein signaling pathway response to chemical response to toxic substance	cell periphery cellular anatomical structure plasma membrane membrane membrane-bounded organelle intracellular anatomical structure organelle subcompartment intracellular membrane-bounded organelle endomembrane system endoplasmic reticulum subcompartment intracellular organelle organelle nuclear outer membrane-endoplasmic reticulum membrane network endoplasmic reticulum cell periphery cellular anatomical structure plasma membrane membrane membrane-bounded organelle intracellular anatomical structure organelle subcompartment intracellular membrane-bounded organelle endomembrane system endoplasmic reticulum subcompartment intracellular organelle organelle nuclear outer membrane-endoplasmic reticulum membrane network endoplasmic reticulum cytoplasm organelle membrane endoplasmic reticulum membrane
B [auth H]	anti-GUCY2C-scFv antibody heavy chain	-	-	-
C [auth L]	anti-GUCY2C-scFv antibody light chain	-	-	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR018297	Adenylyl cyclase class-4/guanylyl cyclase, conserved site	Conserved Site
A	IPR028082	Periplasmic binding protein-like I	Homologous Superfamily
A	IPR042822	Membrane Guanylate Cyclase receptor GC-C, pseudokinase domain	Domain
A	IPR001054	Adenylyl cyclase class-3/4/guanylyl cyclase	Domain
A	IPR011009	Protein kinase-like domain superfamily	Homologous Superfamily
A	IPR050401	Cyclic nucleotide synthase	Family
A	IPR000719	Protein kinase domain	Domain
A	IPR001245	Serine-threonine/tyrosine-protein kinase, catalytic domain	Domain
A	IPR029787	Nucleotide cyclase	Homologous Superfamily

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
A	Pharos: P25092	congenital diarrhea 6 diarrheal disease meconium ileus colorectal cancer intestinal obstruction in the newborn due to guanylate cyclase 2C deficiency Chronic idiopathic constipation irritable bowel syndrome ulcerative colitis intellectual disability metastatic melanoma colorectal carcinoma lung carcinoma pancreatic intraductal papillary-mucinous carcinoma

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM157729. RCSB PDB uses resources of the National Energy Research Scientific Computing Center (NERSC), a Department of Energy User Facility.