UniProtKB/Swiss-Prot P13569: Variant p.Arg258Gly

Cystic fibrosis transmembrane conductance regulator
Gene: CFTR
Chromosomal location: 7q31.2
Variant information

Variant position:  258
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 have been found in patients and disease-association is reported in literature. However, this classification is not a definitive assessment of variant pathogenicity.
  • Polymorphism: No disease-association has been reported.
  • Unclassified: Variants have been found in patients but disease-association remains unclear.

Residue change:  From Arginine (R) to Glycine (G) at position 258 (R258G, p.Arg258Gly).
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 large size and basic (R) to glycine (G)
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

Variant description:  In CBAVD.
Any additional useful information about the variant.

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



Sequence information

Variant position:  258
The position of the amino-acid change on the UniProtKB canonical protein sequence.

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

Location on the sequence:   AGLGRMMMKYRDQRAGKISE  R LVITSEMIENIQSVKAYCWE
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                         AGLGRMMMKYRDQRAGKISERLVITSEMIENIQSVKAYCWE

Gorilla                       AGLGRMMMKYRDQRAGKINERLVITSEMIENIQSVKAYCWE

Rhesus macaque                AGLGRMMMKYRDQRAGKINERLVITSEMIENIQSVKAYCWE

Chimpanzee                    AGLGRMMMKYRDQRAGKISERLVITSEMIENIQSVKAYCWE

Mouse                         AILGKMMVKYRDQRAAKINERLVITSEIIDNIYSVKAYCWE

Rat                           AILGKMMVKYRDKRAAKINERLVITSEVIDNIYSVKAYCWE

Pig                           AGLGKMMMKYRDQRAGKINERLVITSEMIENIQSVKAYCWE

Bovine                        AGLGKMMMKYRDQRAGKINERLVITSEMIENIQSVKAYCWE

Rabbit                        AGLGRMMMKYRDQRAGKINERLVITSEMIENIQSVKAYCWE

Sheep                         AGLGKMMMKYRDQRAGKINERLVITSEMIENIQSVKAYCWE

Dog                           AGLGRMIMKYRDQRAGKINERLVITSEVIENIQSVKAYCWE

Horse                         AGLGRMMMKYRDQRAGKINERLVITSEMIENIQSVKAYCWE

Xenopus laevis                ARLGRMMMKYKDKRAGKINERLVITSQIIENIQSVKAYCWE

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 1 – 1480 Cystic fibrosis transmembrane conductance regulator
Topological domain 242 – 307 Cytoplasmic
Domain 81 – 365 ABC transmembrane type-1 1


Literature citations

Is congenital bilateral absence of vas deferens a primary form of cystic fibrosis? Analyses of the CFTR gene in 67 patients.
Mercier B.; Verlingue C.; Lissens W.; Silber S.J.; Novelli G.; Bonduelle M.; Audrezet M.-P.; Ferec C.;
Am. J. Hum. Genet. 56:272-277(1995)
Cited for: VARIANTS CBAVD ARG-149; LYS-193; GLY-258 AND GLY-800;

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.