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UniProtKB/Swiss-Prot variant pages

UniProtKB/Swiss-Prot P01130: Variant p.Asp168Asn

Low-density lipoprotein receptor
Gene: LDLR
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Variant information Variant position: help 168 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 Aspartate (D) to Asparagine (N) at position 168 (D168N, p.Asp168Asn). 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 acidic (D) to medium size and polar (N) 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 FHCL1; 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 168 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 CGPASFQCNSSTCIPQLWAC D NDPDCEDGSDEWPQRCRGLY 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                         CGPASFQCNSSTCIPQLWACDNDPDCEDGSDEWPQRCRGLY

Mouse                         CGPAHFRCNSSICIPSLWACDGDVDCVDGSDEWPQNCQGRD

Rat                           CGPAHFRCNSSSCIPSLWACDGDRDCDDGSDEWPQNCGAED

Bovine                        CGPANFQCNSSMCIPQLWACDGDPDCDDGSDEWPKHCGTPH
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 146 – 186 LDL-receptor class A 4
Region 146 – 233 Binding to Getah virus E1-E2 spike glycoproteins
Glycosylation 156 – 156 N-linked (GlcNAc...) asparagine
Disulfide bond 155 – 173
Disulfide bond 167 – 184
Alternative sequence 105 – 272 Missing. In isoform 3.
Alternative sequence 106 – 232 Missing. In isoform 2.
Mutagenesis 165 – 165 W -> I. Partial loss of binding to getah virus E2-E1 spike glycoproteins.
Mutagenesis 168 – 168 D -> K. Partial loss of binding to getah virus E2-E1 spike glycoproteins.
Mutagenesis 175 – 175 D -> K. Partial loss of binding to getah virus E2-E1 spike glycoproteins.
Beta strand 168 – 170



Literature citations
Spectrum of LDL receptor gene mutations in heterozygous familial hypercholesterolemia.
Day I.N.M.; Whittall R.A.; O'Dell S.D.; Haddad L.; Bolla M.K.; Gudnason V.; Humphries S.E.;
Hum. Mutat. 10:116-127(1997)
Cited for: VARIANTS FHCL1 TRP-27; CYS-78; GLY-87; TYR-89; ASN-90; GLY-90; LYS-101; TYR-160; ASN-168; LEU-177; GLY-221; GLU-227; ARG-286; TYR-313; TYR-327; ASN-342; PRO-350; ASP-399; TRP-416; HIS-482; ARG-483; SER-526; ASP-549; CYS-633; LEU-649 AND ILE-726; 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.