Nomenclature for factors of the HLA system, update November 2006 *
The following sequences have been submitted to the Nomenclature Committee since the October 2006 nomenclature update and, following agreed policy, have been assigned official allele designations. Full details of all sequences will be published in a forthcoming report. Below are listed the newly assigned sequences (Table 1) and confirmations of previously reported sequences (Table 2). The accession number of each sequence is given and these can be used to retrieve the sequence files from either the EMBL, GenBank or DDBJ data libraries.
A new HLA-Cw*03 variant - Cw*031102.
A novel variant of HLA-Cw*0311, Cw*031102, possessing a silent substitution at codon 18 (GGA → GGG - conserved glycine) is described in this study.
Reptilian class I major histocompatibility complex genes reveal conserved elements in class I structure
The polymerase chain reaction was used to isolate clones with class I major histocompatibility complex sequences from fish (carp), amphibian (axolotl), and two species of reptile (lizard and snake). The lizard and snake clones were used to isolate class I cDNA clones. All the sequence showed the expected evolutionary relatedness. The carp and axolotl clones and one lizard cDNA clone lacked the first systeine in the α3 domain which in other class I heavy chains forms an intradomain disulfide bond. A small number of amino acid residues are conserved in the class I heavy chain sequences from all five classes of vertebrates. In the first two domains they are symmetrically clustered and contribute to intra-and interdomain contacts. None of these invariant residues are at peptide-binding, T-cell receptor-interacting, or CD8-binding positions.