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UniProtKB/Swiss-Prot Q9BUP3: Variant p.Leu144Ile

Oxidoreductase HTATIP2
Gene: HTATIP2
Variant information

Variant position:  144
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Type of variant:  US
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 Leucine (L) to Isoleucine (I) at position 144 (L144I, p.Leu144Ile).
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:  Similar physico-chemical property. Both residues are medium size and hydrophobic.
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 a hepatocellular carcinoma sample.
Any additional useful information about the variant.



Sequence information

Variant position:  144
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Protein sequence length:  242
The length of the canonical sequence.

Location on the sequence:   CKHFNLLSSKGADKSSNFLY  L QVKGEVEAKVEELKFDRYSV
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                         CKHFNLLSSKGADKSSNFLYLQVKGEVEAKVEELKFDRYSV

Gorilla                       CKHFNLLSSKGADKSSKFLYLQVKGEVEAKVEELKFDRYSV

Mouse                         CKHFNLLSSRGADKSSSFLYLQVKGEVEAKVEELKFDRLSV

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 – 242 Oxidoreductase HTATIP2
Active site 143 – 143 Proton acceptor
Active site 147 – 147
Binding site 131 – 131 Substrate
Alternative sequence 134 – 242 Missing. In isoform 2.
Helix 142 – 155


Literature citations

TIP30 deficiency increases susceptibility to tumorigenesis.
Ito M.; Jiang C.; Krumm K.; Zhang X.; Pecha J.; Zhao J.; Guo Y.; Roeder R.G.; Xiao H.;
Cancer Res. 63:8763-8767(2003)
Cited for: TISSUE SPECIFICITY; VARIANTS SER-106; TYR-108; THR-116; VAL-134 AND ILE-144; MUTAGENESIS OF ARG-106; CHARACTERIZATION OF VARIANT VAL-134;

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.