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UniProtKB/Swiss-Prot variant pages

UniProtKB/Swiss-Prot P29965: Variant p.Trp140Cys

CD40 ligand
Gene: CD40LG
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Variant information Variant position: help 140 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 Tryptophan (W) to Cysteine (C) at position 140 (W140C, p.Trp140Cys). 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 aromatic (W) to medium size and polar (C) 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 HIGM1. Any additional useful information about the variant.


Sequence information Variant position: help 140 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Protein sequence length: help 261 The length of the canonical sequence.
Location on the sequence: help PQIAAHVISEASSKTTSVLQ W AEKGYYTMSNNLVTLENGKQ 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                         PQ----------------IAAHVISEASSKTTSVLQWAEKGYYTMSNNLVTLENGKQ

                              PR----------------IAAHVISEASSNPASVLRWAPKG

Rhesus macaque                PQ----------------IAAHVISEASSKTTSVLQWAEKG

Mouse                         PQ----------------IAAHVVSEANSNAASVLQWAKKG

Rat                           PQ----------------IAAHVVSEANSNAASVLQWAKKG

Pig                           PQ----------------IAAHVISEASSKTASVLQWAPKG

Bovine                        PQ----------------IAAHVISEASSKTTSVLQWAPKG

Cat                           PR----------------VAAHVISEASSSTASVLQWAPKG

Chicken                       PHLKSRNETSVAEEKRQPIATHLAGVKSNTTVRVLKWMTTS
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 – 261 CD40 ligand, membrane form
Chain 113 – 261 CD40 ligand, soluble form
Topological domain 47 – 261 Extracellular
Domain 122 – 261 THD
Beta strand 139 – 142



Literature citations
Mutations of the CD40 ligand gene in 13 Japanese patients with X-linked hyper-IgM syndrome.
Nonoyama S.; Shimadzu M.; Toru H.; Seyama K.; Nunoi H.; Neubauer M.; Yata J.; Och H.D.;
Hum. Genet. 99:624-627(1997)
Cited for: VARIANTS HIGM1 ARG-36; CYS-140; GLY-227 DEL; SER-231 AND MET-254;
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.