| RRC ID |
28645
|
| 著者 |
Kim HM, Oh SC, Lim KJ, Kasamatsu J, Heo JY, Park BS, Lee H, Yoo OJ, Kasahara M, Lee JO.
|
| タイトル |
Structural diversity of the hagfish variable lymphocyte receptors.
|
| ジャーナル |
J Biol Chem
|
| Abstract |
Variable lymphocyte receptors (VLRs) are recently discovered leucine-rich repeat (LRR) family proteins that mediate adaptive immune responses in jawless fish. Phylogenetically it is the oldest adaptive immune receptor and the first one with a non-immunoglobulin fold. We present the crystal structures of one VLR-A and two VLR-B clones from the inshore hagfish. The hagfish VLRs have the characteristic horseshoe-shaped structure of LRR family proteins. The backbone structures of their LRR modules are highly homologous, and the sequence variation is concentrated on the concave surface of the protein. The conservation of key residues suggests that our structures are likely to represent the LRR structures of the entire repertoire of jawless fish VLRs. The analysis of sequence variability, prediction of protein interaction surfaces, amino acid composition analysis, and structural comparison with other LRR proteins suggest that the hypervariable concave surface is the most probable antigen binding site of the VLR.
|
| 巻・号 |
282(9)
|
| ページ |
6726-32
|
| 公開日 |
2007-3-2
|
| DOI |
10.1074/jbc.M608471200
|
| PII |
S0021-9258(20)52284-9
|
| PMID |
17192264
|
| MeSH |
Amino Acid Sequence
Animals
Antibody Formation / genetics
Binding Sites
Crystallography, X-Ray
Gene Rearrangement*
Hagfishes
Lampreys
Protein Conformation
Receptors, Antigen / chemistry*
Receptors, Antigen / genetics
Receptors, Antigen / isolation & purification
Sequence Homology
|
| IF |
4.238
|
| 引用数 |
85
|
|
WOS 分野
|
BIOCHEMISTRY & MOLECULAR BIOLOGY
|
| リソース情報 |
| 遺伝子材料 |
VLRB.61 (RDB06725) |
