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UniProtKB/Swiss-Prot P69905: Variant p.Arg32Ser

Hemoglobin subunit alpha
Gene: HBA2
Variant information

Variant position:  32
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 Arginine (R) to Serine (S) at position 32 (R32S, p.Arg32Ser).
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 small size and polar (S)
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

Variant description:  In Prato; unstable.
Any additional useful information about the variant.

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



Sequence information

Variant position:  32
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Protein sequence length:  142
The length of the canonical sequence.

Location on the sequence:   KAAWGKVGAHAGEYGAEALE  R MFLSFPTTKTYFPHFDLSHG
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                         KAAWGKVGAHAGEYGAEALERMFLSFPTTKTYFPHF-DLSHG

Gorilla                       KAAWGKVGAHAGDYGAEALERMFLSFPTTKTYFPHF-DLSH

                              KSTWDKIGGHAGDYGGEALDRTFQSFPTTKTYFPHF-DLSP

Rhesus macaque                KAAWGKVGGHAGEYGAEALERMFLSFPTTKTYFPHF-DLSH

Chimpanzee                    KAAWGKVGAHAGEYGAEALERMFLSFPTTKTYFPHF-DLSH

Mouse                         KAAWGKIGGHGAEYGAEALERMFASFPTTKTYFPHF-DVSH

Rat                           KNCWGKIGGHGGEYGEEALQRMFAAFPTTKTYFSHI-DVSP

Pig                           KAAWGKVGGQAGAHGAEALERMFLGFPTTKTYFPHF-NLSH

Bovine                        KAAWGKVGGHAAEYGAEALERMFLSFPTTKTYFPHF-DLSH

Rabbit                        KTAWEKIGSHGGEYGAEAVERMFLGFPTTKTYFPHF-DFTH

Sheep                         KAAWGKVGGNAGAYGAEALERMFLSFPTTKTYFPHF-DLSH

Cat                           KACWGKIGSHAGEYGAEALERTFCSFPTTKTYFPHF-DLSH

Horse                         KAAWSKVGGHAGEYGAEALERMFLGFPTTKTYFPHF-DLSH

Chicken                       KGIFTKIAGHAEEYGAETLERMFTTYPPTKTYFPHF-DLSH

Xenopus tropicalis            KAIWPSVAAHGDKYGGEALHRMFMCAPKTKTYFPDF-DFSE

Zebrafish                     KAIWAKISPKADEIGAEALARMLTVYPQTKTYFSHWADLSP

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 – 142 Hemoglobin subunit alpha
Site 12 – 12 Not glycated
Modified residue 12 – 12 N6-succinyllysine
Modified residue 17 – 17 N6-acetyllysine; alternate
Modified residue 17 – 17 N6-succinyllysine; alternate
Modified residue 25 – 25 Phosphotyrosine
Modified residue 36 – 36 Phosphoserine
Modified residue 41 – 41 N6-succinyllysine; alternate
Modified residue 50 – 50 Phosphoserine
Glycosylation 17 – 17 N-linked (Glc) (glycation) lysine; alternate
Glycosylation 41 – 41 N-linked (Glc) (glycation) lysine; alternate
Helix 22 – 36


Literature citations

A new abnormal human hemoglobin: Hb Prato (alpha 2 31 (B12) Arg leads to Ser beta 2).
Marinucci M.; Mavilio F.; Massa A.; Gabbianelli M.; Fontanarosa P.P.; Camagna A.; Ignesti C.; Tentori L.;
Biochim. Biophys. Acta 578:534-540(1979)
Cited for: VARIANT PRATO SER-32;

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.