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UniProtKB/Swiss-Prot P13569: Variant p.Gly178Arg

Cystic fibrosis transmembrane conductance regulator
Gene: CFTR
Variant information

Variant position:  178
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Type of variant:  Disease [Disclaimer]
The variants are classified into three categories: Disease, Polymorphism and Unclassified.
  • Disease: Variants implicated in disease according to literature reports.
  • Polymorphism: Variants not reported to be implicated in disease.
  • Unclassified: Variants with uncertain implication in disease according to literature reports. Evidence against or in favor of a pathogenic role is limited and/or conflicting.

Residue change:  From Glycine (G) to Arginine (R) at position 178 (G178R, p.Gly178Arg).
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 glycine (G) to large size and basic (R)
The physico-chemical property of the reference and variant residues and the change implicated.

BLOSUM score:  -2
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

Involvement in disease:  Cystic fibrosis (CF) [MIM:219700]: A common generalized disorder of the exocrine glands which impairs clearance of secretions in a variety of organs. It is characterized by the triad of chronic bronchopulmonary disease (with recurrent respiratory infections), pancreatic insufficiency (which leads to malabsorption and growth retardation) and elevated sweat electrolytes. It is the most common genetic disease in Caucasians, with a prevalence of about 1 in 2'000 live births. Inheritance is autosomal recessive. {ECO:0000269|PubMed:10094564, ECO:0000269|PubMed:11242048, ECO:0000269|PubMed:12167682, ECO:0000269|PubMed:12394343, ECO:0000269|PubMed:12529365, ECO:0000269|PubMed:1284466, ECO:0000269|PubMed:1284468, ECO:0000269|PubMed:1284529, ECO:0000269|PubMed:1284530, ECO:0000269|PubMed:1284548, ECO:0000269|PubMed:1379210, ECO:0000269|PubMed:15528182, ECO:0000269|PubMed:15716351, ECO:0000269|PubMed:16822950, ECO:0000269|PubMed:1695717, ECO:0000269|PubMed:1699669, ECO:0000269|PubMed:17098864, ECO:0000269|PubMed:1710600, ECO:0000269|PubMed:1712898, ECO:0000269|PubMed:17182731, ECO:0000269|PubMed:20008117, ECO:0000269|PubMed:20150177, ECO:0000269|PubMed:20691141, ECO:0000269|PubMed:21884936, ECO:0000269|PubMed:2236053, ECO:0000269|PubMed:25330774, ECO:0000269|PubMed:26846474, ECO:0000269|PubMed:28001373, ECO:0000269|PubMed:28067262, ECO:0000269|PubMed:28087700, ECO:0000269|PubMed:7504969, ECO:0000269|PubMed:7505694, ECO:0000269|PubMed:7513296, ECO:0000269|PubMed:7517264, ECO:0000269|PubMed:7520022, ECO:0000269|PubMed:7522211, ECO:0000269|PubMed:7524909, ECO:0000269|PubMed:7524913, ECO:0000269|PubMed:7525450, ECO:0000269|PubMed:7537150, ECO:0000269|PubMed:7541273, ECO:0000269|PubMed:7541510, ECO:0000269|PubMed:7543567, ECO:0000269|PubMed:7544319, ECO:0000269|PubMed:7581407, ECO:0000269|PubMed:7606851, ECO:0000269|PubMed:7680525, ECO:0000269|PubMed:7683628, ECO:0000269|PubMed:7683954, ECO:0000269|PubMed:8081395, ECO:0000269|PubMed:8406518, ECO:0000269|PubMed:8522333, ECO:0000269|PubMed:8723693, ECO:0000269|PubMed:8723695, ECO:0000269|PubMed:8800923, ECO:0000269|PubMed:8829633, ECO:0000269|PubMed:8910473, ECO:0000269|PubMed:8956039, ECO:0000269|PubMed:9101301, ECO:0000269|PubMed:9222768, ECO:0000269|PubMed:9375855, ECO:0000269|PubMed:9401006, ECO:0000269|PubMed:9443874, ECO:0000269|PubMed:9452048, ECO:0000269|PubMed:9452054, ECO:0000269|PubMed:9452073, ECO:0000269|PubMed:9482579, ECO:0000269|PubMed:9521595, ECO:0000269|PubMed:9554753, ECO:0000269|PubMed:9736778, ECO:0000269|PubMed:9804160, ECO:0000269|PubMed:9921909}. Note=The disease is caused by mutations affecting the gene represented in this entry.
The name and a short description of the disease associated with the variant. For more information about the disease, the user can refer to OMIM, following the link provided after the disease acronym.

Variant description:  In CF; loss of bicarbonate transport; no effect on protein maturation, subcellular location at the plasma membrane, nor on chloride channel activity.
Any additional useful information about the variant.

Other resources:  
Links to websites of interest for the variant.

Sequence information

Variant position:  178
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Protein sequence length:  1480
The length of the canonical sequence.

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.















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.

Chain 1 – 1480 Cystic fibrosis transmembrane conductance regulator
Topological domain 147 – 195 Cytoplasmic
Domain 81 – 365 ABC transmembrane type-1 1
Helix 177 – 194

Literature citations

Molecular characterization of cystic fibrosis: 16 novel mutations identified by analysis of the whole cystic fibrosis conductance transmembrane regulator (CFTR) coding regions and splice site junctions.
Fanen P.; Ghanem N.; Vidaud M.; Besmond C.; Martin J.; Costes B.; Plassa F.; Goossens M.;
Genomics 13:770-776(1992)
Cited for: VARIANTS VAL-44; MET-470; VAL-506; CYS-508; ALA-576; CYS-668; PHE-997; THR-1027 AND LEU-1162; VARIANTS CF GLY-44; ARG-178; ARG-225; TRP-334; PHE-508 DEL; 542-GLY--LEU-1480 DEL; ASP-551; ILE-562; ARG-628; 710-LYS--LEU-1480 DEL; 846-TRP--LEU-1480 DEL; CYS-913; 1063-TRP--LEU-1480 DEL; CYS-1066; 1092-TYR--LEU-1480 DEL; 1162-ARG--LEU-1480 DEL; GLU-1200; 1282-TRP--LEU-1480 DEL AND LYS-1303;

Aberrant CFTR-dependent HCO3- transport in mutations associated with cystic fibrosis.
Choi J.Y.; Muallem D.; Kiselyov K.; Lee M.G.; Thomas P.J.; Muallem S.;
Nature 410:94-97(2001)
Cited for: CHARACTERIZATION OF VARIANTS CF HIS-117; THR-148; ARG-178; LYS-193; ASP-551; SER-551; GLN-620; VAL-648; GLY-800; TYR-949; THR-1067; GLN-1070; GLU-1244; PRO-1255 AND ASP-1349;

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.