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UniProtKB/Swiss-Prot variant pages

UniProtKB/Swiss-Prot Q9BZ23: Variant p.Thr327Ile

Pantothenate kinase 2, mitochondrial
Gene: PANK2
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Variant information Variant position: help 327 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Type of variant: help 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: help From Threonine (T) to Isoleucine (I) at position 327 (T327I, p.Thr327Ile). 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: help Change from medium size and polar (T) to medium size and hydrophobic (I) The physico-chemical property of the reference and variant residues and the change implicated.
BLOSUM score: help -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: help In NBIA1; no effect on enzyme activity. Any additional useful information about the variant.


Sequence information Variant position: help 327 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Protein sequence length: help 570 The length of the canonical sequence.
Location on the sequence: help LHTVFCATGGGAYKFEQDFL T IGDLQLCKLDELDCLIKGIL 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: help The multiple alignment of the region surrounding the variant against various orthologous sequences. 
Human                         LHTVFCATGGGAYKFEQDFLTIGDLQLCKLDELDCLIKGIL

Mouse                         LHTVFCATGGGSYKFEQDFLTIGDLQLRKLDELDCLIKGIL
Sequence annotation in neighborhood: help 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 32 – 570 Pantothenate kinase 2, mitochondrial intermediate form
Chain 141 – 570 Pantothenate kinase 2, mitochondrial mature form
Active site 338 – 338 Proton acceptor
Helix 322 – 329



Literature citations
A novel pantothenate kinase gene (PANK2) is defective in Hallervorden-Spatz syndrome.
Zhou B.; Westaway S.K.; Levinson B.; Johnson M.A.; Gitschier J.; Hayflick S.J.;
Nat. Genet. 28:345-349(2001)
Cited for: IDENTIFICATION; ALTERNATIVE INITIATION AT LEU-111; VARIANTS GLN-111 AND ALA-126; VARIANTS NBIA1 VAL-219; ALA-234; TRP-264; CYS-278; VAL-282; CYS-286; ILE-327; PRO-351; SER-355; ILE-404; PRO-413; ASN-471; THR-497; ILE-500; ARG-521 AND MET-528; TISSUE SPECIFICITY; Biochemical properties of human pantothenate kinase 2 isoforms and mutations linked to pantothenate kinase-associated neurodegeneration.
Zhang Y.M.; Rock C.O.; Jackowski S.;
J. Biol. Chem. 281:107-114(2006)
Cited for: CHARACTERIZATION OF VARIANTS NBIA1 VAL-219; ALA-234; TRP-264; CYS-286; ILE-327; PRO-351; ILE-404; ASN-471; ILE-500; VAL-509; ARG-521; MET-528 AND TRP-532; FUNCTION (ISOFORMS 1 AND 4); CATALYTIC ACTIVITY (ISOFORMS 1 AND 4); SUBUNIT; ACTIVITY REGULATION (ISOFORM 1); PROTEOLYTIC PROCESSING; BIOPHYSICOCHEMICAL PROPERTIES;
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.