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UniProtKB/Swiss-Prot P32004: Variant p.Leu120Val

Neural cell adhesion molecule L1
Gene: L1CAM
Variant information

Variant position:  120
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Type of variant:  Polymorphism
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 Leucine (L) to Valine (V) at position 120 (L120V, p.Leu120Val).
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:  Similar physico-chemical property. Both residues are medium size and hydrophobic.
The physico-chemical property of the reference and variant residues and the change implicated.

BLOSUM score:  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:  No effect on axon guidance activity, nor on synapse formation, when assayed in a heterologous system.
Any additional useful information about the variant.

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



Sequence information

Variant position:  120
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Protein sequence length:  1257
The length of the canonical sequence.

Location on the sequence:   NNSNFAQRFQGIYRCFASNK  L GTAMSHEIRLMAEGAPKWPK
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.

Human                         NNSNFAQRFQGIYRCFASNKLGTAMSHEIRLMAEGAPKWPK

Mouse                         NNS-FAQRFQGIYRCYASNKLGTAMSHEIQLVAEGAPKWPK

Rat                           NNS-FAQRFQGIYRCYASNNLGTAMSHEIQLVAEGAPKWPK

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.

TypePositionsDescription
Chain 20 – 1257 Neural cell adhesion molecule L1
Topological domain 20 – 1120 Extracellular
Domain 35 – 125 Ig-like C2-type 1
Glycosylation 100 – 100 N-linked (GlcNAc...) asparagine


Literature citations

Differential effects of human L1CAM mutations on complementing guidance and synaptic defects in Drosophila melanogaster.
Kudumala S.; Freund J.; Hortsch M.; Godenschwege T.A.;
PLoS ONE 8:E76974-E76974(2013)
Cited for: CHARACTERIZATION OF VARIANT VAL-120; CHARACTERIZATION OF VARIANTS MASA GLN-210 AND LYS-309; CHARACTERIZATION OF VARIANTS HSAS GLN-184; TYR-264 AND CYS-1070; MUTAGENESIS OF 1147-LYS--VAL-1153;

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.