Journal article
Cloning, mapping and genomic organization of a fish C-type lectin gene from homozygous clones of rainbow trout ( Oncorhynchus mykiss)
Biochimica et biophysica acta. Gene structure and expression, Vol.1494(1), pp.14-22
2000
Handle:
https://hdl.handle.net/2376/108677
PMID: 11072064
Abstract
Utilizing a splenic cDNA library and rapid amplification of cDNA 5′ ends (5′-RACE), a C-type lectin gene was cloned from a homozygous cloned rainbow trout. The 1176 bp cDNA contains a 714 bp open reading frame from which a 238-amino-acid (aa) (27 kDa) protein was deduced. It was confirmed that this protein belongs to the C-type animal lectins, and is a type II membrane receptor. The predicted protein from this sequence contains a 48 aa cytoplasmic domain, a 20 aa transmembrane domain (TM), a 46 aa stalk region and a 124 aa carbohydrate-recognition domain (CRD). The stalk region contains a leucine-zipper, and an
N-glycosylation site was also found in the CRD. Sequence alignment and phylogenetic analysis of the CRD indicate that the protein has similarity with human dendritic cell immunoreceptor (DCIR), gp120 binding C-type lectin (gp120BCL) and mammalian hepatic lectins. The N-terminus (aa 4–183) has similarity with NKG2, a group of C-type lectin receptors important in human natural killer cell function. The genomic DNA (gDNA) containing this gene was amplified and sequenced. The 4569 bp gDNA contains five exons and four introns. The first three exons encode the cytoplasmic domain, the TM and stalk region, respectively. Unlike the other type II C-type lectin receptors in which the CRD was encoded by three exons, the CRD of this lectin was encoded by two exons. A transposon
Tc1-like fragment was found in intron III. Intron IV is composed of a simple repeat. Tissue-specific expression of the gene was studied by RT–PCR, and it was mainly expressed in spleen and peripheral blood leukocyte (PBL). Using
AluI to digest the fragment containing exon I, intron I and exon II, an RFLP was produced between the sequences of this gene in two cloned fish, OSU 142 and Arlee (AR). Seventy-one doubled haploids (DH) of OSU X AR were screened, and the gene was mapped to linkage group XIV on the published map (Young et al., Genetics 148 (1998) 839).
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Details
- Title
- Cloning, mapping and genomic organization of a fish C-type lectin gene from homozygous clones of rainbow trout ( Oncorhynchus mykiss)
- Creators
- Hui Zhang - Washington State University Department of Animal Sciences, 114 New Experimental Animal Laboratory Building, Pullman, WA 99164-6351, USABarrie Robison - School of Biological Sciences, Washington State University, Pullman, WA 99164-4236, USAGary H Thorgaard - School of Biological Sciences, Washington State University, Pullman, WA 99164-4236, USASandra S Ristow - Washington State University Department of Animal Sciences, 114 New Experimental Animal Laboratory Building, Pullman, WA 99164-6351, USA
- Publication Details
- Biochimica et biophysica acta. Gene structure and expression, Vol.1494(1), pp.14-22
- Academic Unit
- Pharmaceutical Sciences, Department of; Biological Sciences, School of
- Publisher
- Elsevier B.V
- Identifiers
- 99900547242701842
- Language
- English
- Resource Type
- Journal article