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UniProtKB/Swiss-Prot variant pages

UniProtKB/Swiss-Prot P05186: Variant p.Arg272Leu

Alkaline phosphatase, tissue-nonspecific isozyme
Gene: ALPL
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Variant information Variant position: help 272 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 Arginine (R) to Leucine (L) at position 272 (R272L, p.Arg272Leu). 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 large size and basic (R) to medium size and hydrophobic (L) The physico-chemical property of the reference and variant residues and the change implicated.
BLOSUM score: help -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: help In HOPS. Any additional useful information about the variant.
Other resources: help Links to websites of interest for the variant.


Sequence information Variant position: help 272 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Protein sequence length: help 524 The length of the canonical sequence.
Location on the sequence: help LVDTWKSFKPRYKHSHFIWN R TELLTLDPHNVDYLLGLFEP 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                         LVDTWKSFKPRYKHSHFIWNRTELLTLDPHNVDYLLGLFEP

Mouse                         LISIWKSFKPRHKHSHYVWNRTELLALDPSRVDYLLGLFEP

Rat                           LISIWKSFKPRHKHSHYVWNRTELLALDPSRVDYLLGLFEP

Bovine                        LIDIWKSFKPKHKHSHYVWNRTDLLALDPHSVDYLLGLFEP

Cat                           LVDIWKSFKPRHKHSHYVWNRTELLTLDPYGVDYLLGLFEP

Chicken                       LVQAWHDTKPAGKVAKYVWHRRELLALNVSRVDFLLGLFEP
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 18 – 501 Alkaline phosphatase, tissue-nonspecific isozyme
Binding site 290 – 290
Binding site 291 – 291
Glycosylation 271 – 271 N-linked (GlcNAc...) asparagine
Mutagenesis 270 – 270 W -> A. Reduced alkaline phosphatase activity.
Mutagenesis 272 – 272 R -> A. Reduced alkaline phosphatase activity.
Mutagenesis 290 – 290 F -> A. Abolished alkaline phosphatase activity.
Mutagenesis 291 – 291 E -> A. Reduced alkaline phosphatase activity.
Helix 272 – 277



Literature citations
Severe hypophosphatasia: characterization of fifteen novel mutations in the ALPL gene.
Spentchian M.; Merrien Y.; Herasse M.; Dobbie Z.; Glaeser D.; Holder S.E.; Ivarsson S.-A.; Kostiner D.; Mansour S.; Norman A.; Roth J.; Stipoljev F.; Taillemite J.-L.; van der Smagt J.J.; Serre J.-L.; Simon-Bouy B.; Taillandier A.; Mornet E.;
Hum. Mutat. 22:105-106(2003)
Cited for: VARIANTS HOPS VAL-62; ARG-63; THR-111; ILE-148; SER-162; GLU-189; ALA-220; LEU-272; 293-GLY-ASP-294 DEL; LYS-311; LYS-452 AND THR-468;
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.