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UniProtKB/Swiss-Prot variant pages

UniProtKB/Swiss-Prot P02545: Variant p.Ala318Thr

Prelamin-A/C
Gene: LMNA
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Variant information Variant position: help 318 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 Alanine (A) to Threonine (T) at position 318 (A318T, p.Ala318Thr). 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 small size and hydrophobic (A) to medium size and polar (T) The physico-chemical property of the reference and variant residues and the change implicated.
BLOSUM score: help 0 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 CMD1A; no effect on nuclear morphology and lamin A localization. Any additional useful information about the variant.
Other resources: help Links to websites of interest for the variant.


Sequence information Variant position: help 318 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Protein sequence length: help 664 The length of the canonical sequence.
Location on the sequence: help RIDSLSAQLSQLQKQLAAKE A KLRDLEDSLARERDTSRRLL 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                         RIDSLSAQLSQLQKQLAAKEAKLRDLEDSLARERDTSRRLL

Mouse                         RIDSLSAQLSQLQKQLAAKEAKLRDLEDSLARERDTSRRLL

Rat                           RIDSLSAQLSQLQKQLAAKEAKLRDLEDSLARERDTSRRLL

Pig                           RIDSLSAQLSQLQKQLAAKEAKLRDLEDSLARERDTSRRLL

Chicken                       RIDSLSAELSQLQKQLAAKEAKLREVEEALSREREGGRRLL

Xenopus laevis                RIDSLSAQLSQLQKQLAAREAKLRDLEDAYARERDSSRRLL
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 – 661 Prelamin-A/C
Chain 1 – 646 Lamin-A/C
Domain 31 – 387 IF rod
Region 243 – 383 Coil 2
Region 259 – 331 Necessary and sufficient for the interaction with IFFO1
Site 325 – 325 Stutter
Site 330 – 330 Heptad change of phase
Modified residue 301 – 301 Phosphoserine
Modified residue 307 – 307 Phosphoserine
Modified residue 311 – 311 N6-acetyllysine; alternate
Cross 311 – 311 Glycyl lysine isopeptide (Lys-Gly) (interchain with G-Cter in SUMO2); alternate
Helix 316 – 384



Literature citations
Morphological analysis of 13 LMNA variants identified in a cohort of 324 unrelated patients with idiopathic or familial dilated cardiomyopathy.
Cowan J.; Li D.; Gonzalez-Quintana J.; Morales A.; Hershberger R.E.;
Circ. Cardiovasc. Genet. 3:6-14(2010)
Cited for: SUBCELLULAR LOCATION; VARIANTS CMD1A LEU-89; PRO-101; PRO-166; GLN-190; LYS-203; SER-210; PRO-215; THR-318; HIS-388; CYS-399 AND HIS-471;
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.