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UniProtKB/Swiss-Prot P43080: Variant p.Leu176Phe

Guanylyl cyclase-activating protein 1
Gene: GUCA1A
Variant information

Variant position:  176
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Type of variant:  US
The variants are classified into three categories: LP/P, LB/B and US.
  • LP/P: likely pathogenic or pathogenic.
  • LB/B: likely benign or benign.
  • US: uncertain significance

Residue change:  From Leucine (L) to Phenylalanine (F) at position 176 (L176F, p.Leu176Phe).
Indicates the amino acid change of the variant. The one-letter and three-letter codes for amino acids used in UniProtKB/Swiss-Prot are those adopted by the commission on Biochemical Nomenclature of the IUPAC-IUB.

Physico-chemical properties:  Change from medium size and hydrophobic (L) to large size and aromatic (F)
The physico-chemical property of the reference and variant residues and the change implicated.

BLOSUM score:  0
The score within a Blosum matrix for the corresponding wild-type to variant amino acid change. The log-odds score measures the logarithm for the ratio of the likelihood of two amino acids appearing by chance. The Blosum62 substitution matrix is used. This substitution matrix contains scores for all possible exchanges of one amino acid with another:
  • Lowest score: -4 (low probability of substitution).
  • Highest score: 11 (high probability of substitution).
More information can be found on the following page

Variant description:  Found in autosomal dominant macular dystrophy; unknown pathological significance; affects guanylate cyclase regulator activity resulting in a constitutively active form at physiologic calcium concentrations; no change of affinity for calcium ions; increased affinity for magnesium ions.
Any additional useful information about the variant.



Sequence information

Variant position:  176
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Protein sequence length:  201
The length of the canonical sequence.

Location on the sequence:   FIEGVQKDQMLLDTLTRSLD  L TRIVRRLQNGEQDEEGADEA
The residue change on the sequence. Unless the variant is located at the beginning or at the end of the protein sequence, both residues upstream (20) and downstream (20) of the variant will be shown.

Residue conservation: 
The multiple alignment of the region surrounding the variant against various orthologous sequences.

Human                         FIEGVQKDQMLLDTLTRSLDLTRIVRRLQNGEQDEEGAD----EA

Mouse                         FMEGVQKDQMLLDTLTRSLDLTGIVRRLQNGEHEEAGTGD-

Bovine                        FMEGVQKDQMLLDTLTRSLDLTRIVRRLQNGEQDEEGASGR

Chicken                       FMEGVQKDEVLLDILTRSLDLTHIVKLIQNDGKNPHAPE--

Sequence annotation in neighborhood:  
The regions or sites of interest surrounding the variant. In general the features listed are posttranslational modifications, binding sites, enzyme active sites, local secondary structure or other characteristics reported in the cited references. The "Sequence annotation in neighborhood" lines have a fixed format:
  • Type: the type of sequence feature.
  • Positions: endpoints of the sequence feature.
  • Description: contains additional information about the feature.

TypePositionsDescription
Chain 2 – 201 Guanylyl cyclase-activating protein 1


Literature citations

Dysfunction of cGMP signalling in photoreceptors by a macular dystrophy-related mutation in the calcium sensor GCAP1.
Vocke F.; Weisschuh N.; Marino V.; Malfatti S.; Jacobson S.G.; Reiff C.M.; Dell'Orco D.; Koch K.W.;
Hum. Mol. Genet. 26:133-144(2017)
Cited for: VARIANT PHE-176; CHARACTERIZATION OF VARIANT PHE-176;

Disclaimer: Any medical or genetic information present in this entry is provided for research, educational and informational purposes only. They are not in any way intended to be used as a substitute for professional medical advice, diagnostic, treatment or care.