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UniProtKB/Swiss-Prot P23141: Variant p.Gly143Glu

Liver carboxylesterase 1
Gene: CES1
Variant information

Variant position:  143
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 Glycine (G) to Glutamate (E) at position 143 (G143E, p.Gly143Glu).
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 glycine (G) to medium size and acidic (E)
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

Polymorphism:  Genetic variants in CES1 are associated with clinically significant alterations in pharmacokinetics and drug response of carboxylesterase 1 substrates [MIM:618057].
Additional information on the polymorphism described.

Variant description:  5.4-fold decrease in activity with p-nitrophenyl acetate as substrate; no change in affinity for p-nitrophenyl acetate; loss of activity with L- or D-methylphenidate as substrate.
Any additional useful information about the variant.

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



Sequence information

Variant position:  143
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Protein sequence length:  567
The length of the canonical sequence.

Location on the sequence:   TPADLTKKNRLPVMVWIHGG  G LMVGAASTYDGLALAAHENV
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.

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 18 – 567 Liver carboxylesterase 1
Turn 143 – 145


Literature citations

Two CES1 gene mutations lead to dysfunctional carboxylesterase 1 activity in man: clinical significance and molecular basis.
Zhu H.-J.; Patrick K.S.; Yuan H.-J.; Wang J.-S.; Donovan J.L.; DeVane C.L.; Malcolm R.; Johnson J.A.; Youngblood G.L.; Sweet D.H.; Langaee T.Y.; Markowitz J.S.;
Am. J. Hum. Genet. 82:1241-1248(2008)
Cited for: POLYMORPHISM; BIOPHYSICOCHEMICAL PROPERTIES; VARIANT GLU-143; CHARACTERIZATION OF VARIANT GLU-143;

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.