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UniProtKB/Swiss-Prot variant pages

UniProtKB/Swiss-Prot P01130: Variant p.Arg300Gly

Low-density lipoprotein receptor
Gene: LDLR
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Variant information Variant position: help 300 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 Glycine (G) at position 300 (R300G, p.Arg300Gly). 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 glycine (G) 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 FHCL1; likely pathogenic; does not affect receptor expression at the cell surface; results in reduced LDL binding; results in reduced LDL uptake and internalization. Any additional useful information about the variant.
Other resources: help Links to websites of interest for the variant.


Sequence information Variant position: help 300 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Protein sequence length: help 860 The length of the canonical sequence.
Location on the sequence: help NKFKCHSGECITLDKVCNMA R DCRDWSDEPIKECGTNECLD 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                         NKFKCHSGECITLDKVCNMARDCRDWSDEPIKECGTNECLD

Mouse                         NKFKCHSGECISLDKVCDSARDCQDWSDEPIKECKTNECLD

Rat                           NKFKCHSGECISLDKVCNSARDCRDWSDEPIKECKTNECLD

Bovine                        NKFKCQSGECISLDKVCNSVRDCRDWSDEPLKDCGTNECLD

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 22 – 860 Low-density lipoprotein receptor
Topological domain 22 – 788 Extracellular
Domain 274 – 313 LDL-receptor class A 7
Disulfide bond 284 – 302
Disulfide bond 296 – 313



Literature citations
Genetic diagnosis of familial hypercholesterolemia using a DNA-array based platform.
Alonso R.; Defesche J.C.; Tejedor D.; Castillo S.; Stef M.; Mata N.; Gomez-Enterria P.; Martinez-Faedo C.; Forga L.; Mata P.;
Clin. Biochem. 42:899-903(2009)
Cited for: VARIANTS FHCL1 TYR-155; GLY-300; GLY-301; TRP-416 AND ASN-454; Activity-associated effect of LDL receptor missense variants located in the cysteine-rich repeats.
Etxebarria A.; Benito-Vicente A.; Stef M.; Ostolaza H.; Palacios L.; Martin C.;
Atherosclerosis 238:304-312(2015)
Cited for: CHARACTERIZATION OF VARIANTS FHCL1 ARG-116; ASN-168; ASN-172; GLY-300 AND GLY-301; CHARACTERIZATION OF VARIANT TRP-257;
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.