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UniProtKB/Swiss-Prot P14061: Variant p.Ala238Val

17-beta-hydroxysteroid dehydrogenase type 1
Gene: HSD17B1
Variant information

Variant position:  238
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Type of variant:  LB/B
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 Alanine (A) to Valine (V) at position 238 (A238V, p.Ala238Val).
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 small size and hydrophobic (A) to medium size and hydrophobic (V)
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

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



Sequence information

Variant position:  238
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Protein sequence length:  328
The length of the canonical sequence.

Location on the sequence:   QYLAHSKQVFREAAQNPEEV  A EVFLTALRAPKPTLRYFTTE
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                         QYLAHSKQVFREAAQNPEEVAEVFLTALRAPKPTLRYFTTE

Chimpanzee                    QYLAHSKQVFREAAQNPEEVAEVFLTALRAPKPTLRYFTTE

Mouse                         HYLRGYEQALSEA-QDPEEVTELFLTAMRAPQPALRYFSTN

Rat                           HYQRGYEQALSEA-QDPEEVTELFLTAMRAPQPALRYFSTN

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 – 328 17-beta-hydroxysteroid dehydrogenase type 1
Mutagenesis 222 – 222 H -> A. No effect on conversion of estrone to 17beta-estradiol.
Helix 234 – 246


Literature citations

Detection of polymorphisms in the estradiol 17 beta-hydroxysteroid dehydrogenase II gene at the EDH17B2 locus on 17q11-q21.
Normand T.; Narod S.; Labrie F.; Simard J.;
Hum. Mol. Genet. 2:479-483(1993)
Cited for: VARIANTS VAL-238 AND SER-313;

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.