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UniProtKB/Swiss-Prot variant pages

UniProtKB/Swiss-Prot Q9NP59: Variant p.Asn144Asp

Ferroportin
Gene: SLC40A1
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Variant information Variant position: help 144 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 Asparagine (N) to Aspartate (D) at position 144 (N144D, p.Asn144Asp). 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 (N) to medium size and acidic (D) 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 HFE4; complete loss of HAMP-binding. Any additional useful information about the variant.
Other resources: help Links to websites of interest for the variant.


Sequence information Variant position: help 144 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Protein sequence length: help 571 The length of the canonical sequence.
Location on the sequence: help YHGWVLTSCYILIITIANIA N LASTATAITIQRDWIVVVAG 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                         YHGWVLTSCYILIITIANIANLASTATAITIQRDWIVVVAG

Mouse                         YHGWVLTVCYILIITIANIANLASTATAITIQRDWIVVVAG

Rat                           YHGWVLTVCYILIITIANIANLASTATAITIQRDWIVVVAG

Zebrafish                     YDGWLLTTCYIMVISIANIANLASTAMSITIQRDWVVVVAG
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 1 – 571 Ferroportin
Transmembrane 127 – 162 Helical
Mutagenesis 157 – 157 D -> Y. Loss of iron export activity. Loss of cell surface localization. Increases intracellular manganese.
Helix 126 – 155



Literature citations
Structure-function analysis of ferroportin defines the binding site and an alternative mechanism of action of hepcidin.
Aschemeyer S.; Qiao B.; Stefanova D.; Valore E.V.; Sek A.C.; Ruwe T.A.; Vieth K.R.; Jung G.; Casu C.; Rivella S.; Jormakka M.; Mackenzie B.; Ganz T.; Nemeth E.;
Blood 131:899-910(2018)
Cited for: FUNCTION; TRANSPORTER ACTIVITY; SUBCELLULAR LOCATION; INTERACTION WITH HAMP; MUTAGENESIS OF LYS-240; CYS-326; TYR-501 AND ASP-504; CHARACTERIZATION OF VARIANT HFE4 ASP-144; Recent advances in understanding haemochromatosis: a transition state.
Robson K.J.H.; Merryweather-Clarke A.T.; Cadet E.; Viprakasit V.; Zaahl M.G.; Pointon J.J.; Weatherall D.J.; Rochette J.;
J. Med. Genet. 41:721-730(2004)
Cited for: VARIANTS HFE4 ASP-144 AND VAL-270; VARIANT IRON OVERLOAD TYR-326;
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.