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UniProtKB/Swiss-Prot P20823: Variant p.Arg159Gln

Hepatocyte nuclear factor 1-alpha
Gene: HNF1A
Chromosomal location: 12q24.3
Variant information

Variant position:  159
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 Arginine (R) to Glutamine (Q) at position 159 (R159Q, p.Arg159Gln).
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 medium size and polar (Q)
The physico-chemical property of the reference and variant residues and the change implicated.

BLOSUM score:  1
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:  Maturity-onset diabetes of the young 3 (MODY3) [MIM:600496]: A form of diabetes that is characterized by an autosomal dominant mode of inheritance, onset in childhood or early adulthood (usually before 25 years of age), a primary defect in insulin secretion and frequent insulin-independence at the beginning of the disease. {ECO:0000269|PubMed:10078571, ECO:0000269|PubMed:10102714, ECO:0000269|PubMed:10482964, ECO:0000269|PubMed:10588527, ECO:0000269|PubMed:10966642, ECO:0000269|PubMed:12453420, ECO:0000269|PubMed:8945470, ECO:0000269|PubMed:9032114, ECO:0000269|PubMed:9075818, ECO:0000269|PubMed:9075819, ECO:0000269|PubMed:9097962, ECO:0000269|PubMed:9166684, ECO:0000269|PubMed:9287053, ECO:0000269|PubMed:9392505, ECO:0000269|PubMed:9626139, ECO:0000269|PubMed:9754819}. 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 MODY3.
Any additional useful information about the variant.



Sequence information

Variant position:  159
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Protein sequence length:  631
The length of the canonical sequence.

Location on the sequence:   LNQSHLSQHLNKGTPMKTQK  R AALYTWYVRKQREVAQQFTH
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                         LNQSHLSQHLNKGTPMKTQKRAALYTWYVRKQREVAQQFTH

Mouse                         LNQSHLSQHLNKGTPMKTQKRAALYTWYVRKQREVAQQFTH

Rat                           LNQSHLSQHLNKGTPMKTQKRAALYTWYVRKQREVAQQFTH

Chicken                       LNQSHLSQHLNKGTPMKTQKRAALYTWYVRKQREVAQQFTH

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 – 631 Hepatocyte nuclear factor 1-alpha
Alternative sequence 120 – 631 Missing. In isoform 8.
Mutagenesis 177 – 177 F -> S. No significant effect on transcription activation.
Helix 156 – 169


Literature citations

Identification of nine novel mutations in the hepatocyte nuclear factor 1 alpha gene associated with maturity-onset diabetes of the young (MODY3).
Vaxillaire M.; Rouard M.; Yamagata K.; Oda N.; Kaisaki P.J.; Boriraj V.V.; Chevre J.-C.; Boccio V.; Cox R.D.; Lathrop G.M.; Dussoix P.; Philippe J.; Timsit J.; Charpentier G.; Velho G.; Bell G.I.; Froguel P.;
Hum. Mol. Genet. 6:583-586(1997)
Cited for: VARIANTS MODY3 CYS-122; PHE-142 AND GLN-159;

Identification of mutations in the hepatocyte nuclear factor-1alpha gene in Japanese subjects with early-onset NIDDM and functional analysis of the mutant proteins.
Yamada S.; Tomura H.; Nishigori H.; Sho K.; Mabe H.; Iwatani N.; Takumi T.; Kito Y.; Moriya N.; Muroya K.; Ogata T.; Onigata K.; Morikawa A.; Inoue I.; Takeda J.;
Diabetes 48:645-648(1999)
Cited for: VARIANTS MODY3 HIS-12; ASN-158; GLN-159 AND CYS-203;

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.