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Aliases for GUCA1B Gene

Aliases for GUCA1B Gene

  • Guanylate Cyclase Activator 1B (Retina) 2 3
  • GCAP2 3 4 6
  • GCAP 2 3 4
  • GUCA2 3 6
  • RP48 3 6
  • Guanylate Cyclase-Activating Protein, Photoreceptor 2 3
  • Guanylyl Cyclase-Activating Protein 2 3
  • Guanylate Cyclase Activator 1B 4

External Ids for GUCA1B Gene

Previous GeneCards Identifiers for GUCA1B Gene

  • GC06M042154
  • GC06M042198
  • GC06M042199
  • GC06M042259
  • GC06M041870

Summaries for GUCA1B Gene

Entrez Gene Summary for GUCA1B Gene

  • The protein encoded by this gene is a calcium-binding protein that activates photoreceptor guanylate cyclases. This gene may have arisen due to a gene duplication event since there is a highly similar gene clustered with it on chromosome 6. Mutations in this gene can cause a form of retinitis pigmentosa. [provided by RefSeq, Nov 2009]

GeneCards Summary for GUCA1B Gene

GUCA1B (Guanylate Cyclase Activator 1B (Retina)) is a Protein Coding gene. Diseases associated with GUCA1B include retinitis pigmentosa 48 and guca1b-related retinitis pigmentosa. Among its related pathways are Signaling by GPCR and Disease. GO annotations related to this gene include calcium ion binding and calcium sensitive guanylate cyclase activator activity. An important paralog of this gene is KCNIP3.

UniProtKB/Swiss-Prot for GUCA1B Gene

  • Stimulates guanylyl cyclase 1 (GC1) and GC2 when free calcium ions concentration is low, and GC1 and GC2 when free calcium ions concentration is elevated. This Ca(2+)-sensitive regulation of GC is a key event in recovery of the dark state of rod photoreceptors following light exposure

Gene Wiki entry for GUCA1B Gene

No data available for Tocris Summary , PharmGKB "VIP" Summary , fRNAdb sequence ontologies and piRNA Summary for GUCA1B Gene

Genomics for GUCA1B Gene

Regulatory Elements for GUCA1B Gene

Genomic Location for GUCA1B Gene

42,183,284 bp from pter
42,194,956 bp from pter
11,673 bases
Minus strand

Genomic View for GUCA1B Gene

UCSC Golden Path with GeneCards custom track
Cytogenetic band:
Genomic Location for GUCA1B Gene
GeneLoc Logo Genomic Neighborhood Exon StructureGene Density

RefSeq DNA sequence for GUCA1B Gene

Proteins for GUCA1B Gene

  • Protein details for GUCA1B Gene (UniProtKB/Swiss-Prot)

    Protein Symbol:
    Recommended name:
    Guanylyl cyclase-activating protein 2
    Protein Accession:
    Secondary Accessions:
    • Q9NU15

    Protein attributes for GUCA1B Gene

    200 amino acids
    Molecular mass:
    23420 Da
    Quaternary structure:
    No Data Available
    • Binds three calcium ions.

neXtProt entry for GUCA1B Gene

Proteomics data for GUCA1B Gene at MOPED

Post-translational modifications for GUCA1B Gene

  • Modification sites at PhosphoSitePlus
  • Modification sites at neXtProt

Other Protein References for GUCA1B Gene

ENSEMBL proteins:
Reactome Protein details:
REFSEQ proteins:

No data available for DME Specific Peptides for GUCA1B Gene

Domains for GUCA1B Gene

Gene Families for GUCA1B Gene

  • EFHAND :EF-hand domain containing

Protein Domains for GUCA1B Gene

Suggested Antigen Peptide Sequences for GUCA1B Gene

Graphical View of Domain Structure for InterPro Entry



  • Q9UMX6
  • Contains 4 EF-hand domains.
genes like me logo Genes that share domains with GUCA1B: view

Function for GUCA1B Gene

Molecular function for GUCA1B Gene

GENATLAS Biochemistry: guanylate cyclase-activating protein,only expressed in the retina,calmodulin family,regulating phosphoreceptor membrane guanylyl cyclase RETGC2 in a Ca2+ sensitive manner (but less effective than GCAP1 for stimulating RETGC1)
UniProtKB/Swiss-Prot Function: Stimulates guanylyl cyclase 1 (GC1) and GC2 when free calcium ions concentration is low, and GC1 and GC2 when free calcium ions concentration is elevated. This Ca(2+)-sensitive regulation of GC is a key event in recovery of the dark state of rod photoreceptors following light exposure

Gene Ontology (GO) - Molecular Function for GUCA1B Gene

GO ID Qualified GO term Evidence PubMed IDs
GO:0005509 calcium ion binding IEA --
GO:0008048 calcium sensitive guanylate cyclase activator activity IEA --
GO:0030249 guanylate cyclase regulator activity --
genes like me logo Genes that share ontologies with GUCA1B: view

Phenotypes for GUCA1B Gene

MGI mutant phenotypes for GUCA1B:
inferred from 2 alleles
genes like me logo Genes that share phenotypes with GUCA1B: view

Animal Models for GUCA1B Gene

MGI Knock Outs for GUCA1B:

No data available for Enzyme Numbers (IUBMB) , miRNA , Transcription Factor Targeting and HOMER Transcription for GUCA1B Gene

Localization for GUCA1B Gene

Subcellular locations from UniProtKB/Swiss-Prot for GUCA1B Gene

Cell membrane. Note=Membranes of outer segment.

Subcellular locations from

Jensen Localization Image for GUCA1B Gene COMPARTMENTS Subcellular localization image for GUCA1B gene
Compartment Confidence
plasma membrane 5
cytosol 3
nucleus 2
golgi apparatus 1
mitochondrion 1
peroxisome 1

Gene Ontology (GO) - Cellular Components for GUCA1B Gene

GO ID Qualified GO term Evidence PubMed IDs
GO:0001750 photoreceptor outer segment --
GO:0001917 photoreceptor inner segment IEA --
GO:0097381 photoreceptor disc membrane TAS --
genes like me logo Genes that share ontologies with GUCA1B: view

Pathways for GUCA1B Gene

genes like me logo Genes that share pathways with GUCA1B: view

Pathways by source for GUCA1B Gene

Gene Ontology (GO) - Biological Process for GUCA1B Gene

GO ID Qualified GO term Evidence PubMed IDs
GO:0007168 receptor guanylyl cyclase signaling pathway TAS 1327879
GO:0007267 cell-cell signaling TAS 1409606
GO:0007589 body fluid secretion TAS 1327879
GO:0007601 visual perception IEA --
GO:0007602 phototransduction --
genes like me logo Genes that share ontologies with GUCA1B: view

Compounds for GUCA1B Gene

(1) HMDB Compounds for GUCA1B Gene

Compound Synonyms Cas Number PubMed IDs
  • Ca

(4) Novoseek inferred chemical compound relationships for GUCA1B Gene

Compound -log(P) Hits PubMed IDs
guanylate 85.2 25
cgmp 62.7 4
calcium 50.2 34
cysteine 11.9 3
genes like me logo Genes that share compounds with GUCA1B: view

Transcripts for GUCA1B Gene

mRNA/cDNA for GUCA1B Gene

(36) Selected AceView cDNA sequences:
(1) Additional mRNA sequences :
(2) REFSEQ mRNAs :
(1) Ensembl transcripts including schematic representations, and UCSC links where relevant :

Unigene Clusters for GUCA1B Gene

Guanylate cyclase activator 1B (retina):
Representative Sequences:

Alternative Splicing Database (ASD) splice patterns (SP) for GUCA1B Gene

No ASD Table

Relevant External Links for GUCA1B Gene

GeneLoc Exon Structure for
ECgene alternative splicing isoforms for

Expression for GUCA1B Gene

mRNA expression in normal human tissues for GUCA1B Gene

mRNA expression in embryonic tissues and stem cells from LifeMap Discovery

Integrated Proteomics: protein expression from ProteomicsDB, PaxDb, and MOPED for GUCA1B Gene

SOURCE GeneReport for Unigene cluster for GUCA1B Gene Hs.446529

mRNA Expression by UniProt/SwissProt for GUCA1B Gene

Tissue specificity: Retina. Cones and rod
genes like me logo Genes that share expressions with GUCA1B: view

No data available for mRNA differential expression in normal tissues for GUCA1B Gene

Orthologs for GUCA1B Gene

This gene was present in the common ancestor of chordates.

Orthologs for GUCA1B Gene

Organism Taxonomy Gene Similarity Type Details
(Pan troglodytes)
Mammalia GUCA1B 35
  • 99.67 (n)
  • 100 (a)
  • 100 (a)
(Bos Taurus)
Mammalia GUCA1B 35
  • 86.83 (n)
  • 86.5 (a)
  • 84 (a)
(Canis familiaris)
Mammalia GUCA1B 35
  • 87.83 (n)
  • 89 (a)
  • 89 (a)
(Mus musculus)
Mammalia Guca1b 35
  • 86.17 (n)
  • 88.5 (a)
Guca1b 16
Guca1b 36
  • 88 (a)
(Ornithorhynchus anatinus)
Mammalia GUCA1B 36
  • 71 (a)
(Rattus norvegicus)
Mammalia Guca1b 35
  • 87.17 (n)
  • 89 (a)
(Gallus gallus)
Aves GUCA1B 35
  • 73.4 (n)
  • 78.28 (a)
  • 78 (a)
(Anolis carolinensis)
Reptilia GUCA1B 36
  • 67 (a)
tropical clawed frog
(Silurana tropicalis)
Amphibia LOC100489509 35
  • 72.25 (n)
  • 78.68 (a)
(Danio rerio)
Actinopterygii guca1b 35
  • 71.57 (n)
  • 75.63 (a)
guca1b 36
  • 74 (a)
sea squirt
(Ciona savignyi)
Ascidiacea CSA.795 36
  • 30 (a)
Species with no ortholog for GUCA1B:
  • A. gosspyii yeast (Ashbya gossypii)
  • Actinobacteria (Mycobacterium tuberculosis)
  • African clawed frog (Xenopus laevis)
  • African malaria mosquito (Anopheles gambiae)
  • Alicante grape (Vitis vinifera)
  • alpha proteobacteria (Wolbachia pipientis)
  • amoeba (Dictyostelium discoideum)
  • Archea (Pyrococcus horikoshii)
  • baker's yeast (Saccharomyces cerevisiae)
  • barley (Hordeum vulgare)
  • beta proteobacteria (Neisseria meningitidis)
  • bread mold (Neurospora crassa)
  • Chromalveolata (Phytophthora infestans)
  • common water flea (Daphnia pulex)
  • corn (Zea mays)
  • E. coli (Escherichia coli)
  • filamentous fungi (Aspergillus nidulans)
  • Firmicute bacteria (Streptococcus pneumoniae)
  • fission yeast (Schizosaccharomyces pombe)
  • fruit fly (Drosophila melanogaster)
  • green algae (Chlamydomonas reinhardtii)
  • honey bee (Apis mellifera)
  • K. lactis yeast (Kluyveromyces lactis)
  • loblloly pine (Pinus taeda)
  • malaria parasite (Plasmodium falciparum)
  • medicago trunc (Medicago Truncatula)
  • moss (Physcomitrella patens)
  • oppossum (Monodelphis domestica)
  • orangutan (Pongo pygmaeus)
  • pig (Sus scrofa)
  • rainbow trout (Oncorhynchus mykiss)
  • rice (Oryza sativa)
  • rice blast fungus (Magnaporthe grisea)
  • schistosome parasite (Schistosoma mansoni)
  • sea anemone (Nematostella vectensis)
  • sea urchin (Strongylocentrotus purpuratus)
  • sorghum (Sorghum bicolor)
  • soybean (Glycine max)
  • stem rust fungus (Puccinia graminis)
  • sugarcane (Saccharum officinarum)
  • thale cress (Arabidopsis thaliana)
  • tomato (Lycopersicon esculentum)
  • toxoplasmosis (Toxoplasma gondii)
  • Trichoplax (Trichoplax adhaerens)
  • wheat (Triticum aestivum)
  • worm (Caenorhabditis elegans)

Evolution for GUCA1B Gene

Gene Tree for GUCA1B (if available)
Gene Tree for GUCA1B (if available)

Paralogs for GUCA1B Gene

genes like me logo Genes that share paralogs with GUCA1B: view

Variants for GUCA1B Gene

Sequence variations from dbSNP and Humsavar for GUCA1B Gene

SNP ID Clin Chr 06 pos Sequence Context AA Info Type MAF
rs760356 -- 42,184,371(-) gctca(C/T)gcctg utr-variant-3-prime
rs1569880 -- 42,192,855(-) tcacc(C/T)agtgg intron-variant
rs1997980 -- 42,183,497(-) AACTA(A/G)ATTAA utr-variant-3-prime
rs2395803 -- 42,190,858(+) TCCAG(A/C)GTCTT intron-variant
rs2395804 -- 42,196,012(+) TTCAT(A/G)CTTAT upstream-variant-2KB

Structural Variations from Database of Genomic Variants (DGV) for GUCA1B Gene

Variant ID Type Subtype PubMed ID
nsv830649 CNV Loss 17160897
nsv510026 CNV Loss 20534489

Relevant External Links for GUCA1B Gene

HapMap Linkage Disequilibrium report
Human Gene Mutation Database (HGMD)

No data available for Polymorphic Variants from UniProtKB/Swiss-Prot for GUCA1B Gene

Disorders for GUCA1B Gene

(1) OMIM Diseases for GUCA1B Gene (602275)


  • Retinitis pigmentosa 48 (RP48) [MIM:613827]: A retinal dystrophy belonging to the group of pigmentary retinopathies. Retinitis pigmentosa is characterized by retinal pigment deposits visible on fundus examination and primary loss of rod photoreceptor cells followed by secondary loss of cone photoreceptors. Patients typically have night vision blindness and loss of midperipheral visual field. As their condition progresses, they lose their far peripheral visual field and eventually central vision as well. {ECO:0000269 PubMed:15452722}. Note=The disease is caused by mutations affecting the gene represented in this entry.

(2) University of Copenhagen DISEASES for GUCA1B Gene

(3) Novoseek inferred disease relationships for GUCA1B Gene

Disease -log(P) Hits PubMed IDs
retinopathy 42.8 1
retinal degeneration 38.5 1
retinitis pigmentosa 35.2 2

Relevant External Links for GUCA1B

Genetic Association Database (GAD)
Human Genome Epidemiology (HuGE) Navigator
genes like me logo Genes that share disorders with GUCA1B: view

Publications for GUCA1B Gene

  1. Mutations in the gene coding for guanylate cyclase-activating protein 2 (GUCA1B gene) in patients with autosomal dominant retinal dystrophies. (PMID: 15452722) Sato M. … Ohguro H. (Graefes Arch. Clin. Exp. Ophthalmol. 2005) 3 4 23 48
  2. The human GCAP1 and GCAP2 genes are arranged in a tail-to-tail array on the short arm of chromosome 6 (p21.1). (PMID: 9119368) Surguchov A. … Baehr W. (Genomics 1997) 2 3 4 23
  3. A novel mutation (I143NT) in guanylate cyclase-activating protein 1 (GCAP1) associated with autosomal dominant cone degeneration. (PMID: 15505030) Nishiguchi K.M. … Baehr W. (Invest. Ophthalmol. Vis. Sci. 2004) 3 23 48
  4. Genetic analysis of the guanylate cyclase activator 1B (GUCA1B) gene in patients with autosomal dominant retinal dystrophies. (PMID: 10507726) Payne A.M. … Bhattacharya S.S. (J. Med. Genet. 1999) 3 4 23
  5. The DNA sequence and analysis of human chromosome 6. (PMID: 14574404) Mungall A.J. … Beck S. (Nature 2003) 3 4

Products for GUCA1B Gene

Sources for GUCA1B Gene

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