The SREC-I and SREC-II associated with epidermal growth factor in scavenger receptor family are the potential regulative transmembrane receptors in Larimichthys crocea.
In innate immunity, the regulation of the immunologic gene expression plays a vital role in defense against pathogenic threat. The class F scavenger receptors (SCARFs), a kind of crucial immunologic type I transmembrane receptors, mainly involve in the signal transmission and eliminating pathogens in host immune system. In this study, the SREC-I and SREC-II of SCARFs in Larimichthys crocea (designated as LycSREC1 and LycSREC2 respectively) were first identified, the potential genetic locus relationships with other species were depicted and the features of gene expression after Vibrio alginolyticus stimulation were tested. The results demonstrated that the complete ORF sequences of two candidates were 3024 bp and 2832 bp (KM884873 and KM884874) respectively including some important domains and motifs, such as EGF/EGF-like domains, TRAF2-binding consensus motif, generic motif and atipical motif. The gene location maps and genetic locus interpreted that the DNA sequences of LycSREC1 and LycSREC2 were 7603 bp and 4883 bp, and some locus had changed compared with human being, but three more crucial genetic locus were conservative among ten species. Furthermore, quantitative real-time PCR (qRT-PCR) analysis indicated that the highest mRNA expression of LycSREC1 and LycSREC2 were both in liver among eight detected tissues, and their expression were up-regulated by V. alginolyticus stimulation. All these findings would contribute to better understanding the biologic function of SCARFs in defending against pathogenic bacteria challenge and further exploring the innate immune of sciaenidae fish.
National Engineering Research Center of Marine Facilities Aquaculture, Zhejiang Ocean University, Zhoushan 316022, PR China.
Jianyu
J
He
National Engineering Research Center of Marine Facilities Aquaculture, Zhejiang Ocean University, Zhoushan 316022, PR China.
Wei
W
Liu
College of Pharmaceutical Sciences, Zhejiang Chinese Medical University, Hangzhou 310053, PR China.
Shaoping
S
Wang
National Engineering Research Center of Marine Facilities Aquaculture, Zhejiang Ocean University, Zhoushan 316022, PR China.
Wan
W
Liu
National Engineering Research Center of Marine Facilities Aquaculture, Zhejiang Ocean University, Zhoushan 316022, PR China. Electronic address: liuhuihui2004@126.com.
Huihui
H
Liu
D000595:Amino Acid Sequence; D000818:Animals; D001483:Base Sequence; D003001:Cloning, Molecular; D004815:Epidermal Growth Factor / Q000235:genetics / Q000378:metabolism; D005393:Fish Diseases / Q000235:genetics* / Q000276:immunology / Q000378:metabolism; D029941:Fish Proteins / Q000737:chemistry / Q000235:genetics* / Q000378:metabolism; D007113:Immunity, Innate; D008969:Molecular Sequence Data; D016366:Open Reading Frames; D009928:Organ Specificity; D010473:Perciformes; D010802:Phylogeny; D051128:Scavenger Receptors, Class F / Q000737:chemistry / Q000235:genetics* / Q000378:metabolism; D016415:Sequence Alignment / Q000662:veterinary; D014735:Vibrio Infections / Q000235:genetics / Q000276:immunology / Q000378:metabolism / Q000662:veterinary*; D044149:Vibrio alginolyticus / Q000502:physiology
D029941:Fish Proteins; D051128:Scavenger Receptors, Class F; D004815:Epidermal Growth Factor
Innate immune; Larimichthys crocea; Pathogenic bacteria infection; Pattern recognition receptors (PRRs); Scavenger receptors (SRs)