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UniProtKB/Swiss-Prot P02545: Variant p.Arg50Pro

Gene: LMNA
Variant information

Variant position:  50
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Type of variant:  Disease [Disclaimer]
The variants are classified into three categories: Disease, Polymorphism and Unclassified.
  • Disease: Variants implicated in disease according to literature reports.
  • Polymorphism: Variants not reported to be implicated in disease.
  • Unclassified: Variants with uncertain implication in disease according to literature reports. Evidence against or in favor of a pathogenic role is limited and/or conflicting.

Residue change:  From Arginine (R) to Proline (P) at position 50 (R50P, p.Arg50Pro).
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:  Change from large size and basic (R) to medium size and hydrophobic (P)
The physico-chemical property of the reference and variant residues and the change implicated.

BLOSUM score:  -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:  In EDMD2 and MDCL.
Any additional useful information about the variant.

Other resources:  
Links to websites of interest for the variant.

Sequence information

Variant position:  50
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Protein sequence length:  664
The length of the canonical sequence.

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: 
The multiple alignment of the region surrounding the variant against various orthologous sequences.







Sequence annotation in neighborhood:  
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.

Chain 1 – 661 Prelamin-A/C
Chain 1 – 646 Lamin-A/C
Domain 31 – 387 IF rod
Region 1 – 130 Interaction with MLIP
Region 34 – 70 Coil 1A
Modified residue 32 – 32 N6-acetyllysine; alternate
Modified residue 32 – 32 N6-succinyllysine; alternate
Modified residue 51 – 51 Phosphoserine
Modified residue 66 – 66 Phosphoserine
Cross 32 – 32 Glycyl lysine isopeptide (Lys-Gly) (interchain with G-Cter in SUMO2); alternate
Alternative sequence 1 – 99 Missing. In isoform 5.
Alternative sequence 8 – 119 Missing. In isoform 4.

Literature citations

Clinical and molecular genetic spectrum of autosomal dominant Emery-Dreifuss muscular dystrophy due to mutations of the lamin A/C gene.
Bonne G.; Mercuri E.; Muchir A.; Urtizberea A.; Becane H.M.; Recan D.; Merlini L.; Wehnert M.; Boor R.; Reuner U.; Vorgerd M.; Wicklein E.M.; Eymard B.; Duboc D.; Penisson-Besnier I.; Cuisset J.M.; Ferrer X.; Desguerre I.; Lacombe D.; Bushby K.; Pollitt C.; Toniolo D.; Fardeau M.; Schwartz K.; Muntoni F.;
Ann. Neurol. 48:170-180(2000)
Cited for: VARIANTS EDMD2 CYS-45; PRO-50; SER-63; GLU-112 DEL; PRO-222; GLU-232; GLN-249; LYS-261 DEL; PRO-294; LYS-358; LYS-371; LYS-386; TRP-453; LYS-456; SER-520; PRO-527 AND LYS-528;

De novo LMNA mutations cause a new form of congenital muscular dystrophy.
Quijano-Roy S.; Mbieleu B.; Bonnemann C.G.; Jeannet P.Y.; Colomer J.; Clarke N.F.; Cuisset J.M.; Roper H.; De Meirleir L.; D'Amico A.; Ben Yaou R.; Nascimento A.; Barois A.; Demay L.; Bertini E.; Ferreiro A.; Sewry C.A.; Romero N.B.; Ryan M.; Muntoni F.; Guicheney P.; Richard P.; Bonne G.; Estournet B.;
Ann. Neurol. 64:177-186(2008)
Cited for: VARIANTS MDCL SER-39; PRO-50; TRP-249; PRO-302; LYS-358; SER-380; PRO-453; PRO-455 AND ASP-456;

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.