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UniProtKB/Swiss-Prot P13569: Variant p.His949Tyr

Cystic fibrosis transmembrane conductance regulator
Gene: CFTR
Variant information

Variant position:  949
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Type of variant:  LP/P [Disclaimer]
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 Histidine (H) to Tyrosine (Y) at position 949 (H949Y, p.His949Tyr).
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 polar (H) to large size and aromatic (Y)
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 CF; decrease in bicarbonate transport; no effect 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:  949
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:   MGFFRGLPLVHTLITVSKIL  H HKMLHSVLQAPMSTLNTLKA
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                         MGFFRGLPLVHTLITVSKILHHKMLHSVLQAPMSTLNTLKA

Gorilla                       MGFFRGLPLVHTLITVSKILHHKMLHSVLQAPMSTLNTLKA

                              LGLFRGLPLVHTLITVSKILHHKMLHSVLQAPMSTLNTLKA

Rhesus macaque                MGFFRGLPLVHTLITVSKILHHKMLHSVLQAPMSTLNTLKA

Chimpanzee                    MGFFRGLPLVHTLITVSKILHHKMLHSVLQAPMSTLNTLKA

Mouse                         LSLFRGLPLVHTLITASKILHRKMLHSILHAPMSTISKLKA

Rat                           LSLFRGLPLVHTLITASKILHRKMLHSILHAPMSTFNKLKA

Pig                           LGLFRGLPLVHTLITVSKILHRKMLHSVLQAPMSTLNTLKA

Bovine                        LGLFRGLPLVHTLITVSKTLHHKMLQSVLQAPMSTLNTLKT

Rabbit                        LGLFRGLPLVHTLITVSKILHHKMLHSVLQAPMSTLNTLKA

Sheep                         LGLFRGLPLVHTLITVSKTLHHKMLQSVLQAPMSTLNTLKT

Horse                         LGLFRGLPLVHTLITVSKILHHKMLHSVLQAPMSTLNTLKA

Xenopus laevis                LGIFRGLPLVHSLISVSKVLHKKMLHAILHAPMSTFNTMRA

Zebrafish                     MGFFRGLPFVHTTITISKKLHQKMLHAVLSAPMSVLNTMKT

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 940 – 990 Cytoplasmic
Domain 859 – 1155 ABC transmembrane type-1 2
Alternative sequence 606 – 1480 Missing. In isoform 3.
Helix 934 – 957


Literature citations

Identification of eight mutations and three sequence variations in the cystic fibrosis transmembrane conductance regulator (CFTR) gene.
Ghanem N.; Costes B.; Girodon E.; Martin J.; Fanen P.; Goossens M.;
Genomics 21:434-436(1994)
Cited for: VARIANTS CYS-31 AND ILE-1220; VARIANTS CF 890-GLN--LEU-1480 DEL; LEU-912; TYR-949; PRO-1065; PRO-1071 AND 1204-TRP--LEU-1480 DEL;

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.