title: Identification and Expression Profile of the Gonadotropin-Releasing Hormone Receptor in Common Chinese Cuttlefish, Sepiella japonica.
abstract: Gonadotropin-releasing hormone (GnRH) plays a vital role in the regulation of reproduction through interaction with a specific receptor (the GnRH receptor). In this study, the GnRH receptor gene from the cuttlefish Sepiella japonica (SjGnRHR) was identified and characterized. The cloned full-length SjGnRHR cDNA was 1,468 bp long and contained a 1,029 bp open reading frame encoding 342 amino acid residues, 8 bp of 5' untranslated regions (UTR), and 431 bp of 3' UTR. The putative protein was predicted to have a molecular weight of 38.75 kDa and an isoelectric point of 9.47. In addition, this protein was identified as belonging to the rhodopsin-type (class A) G protein-coupled receptor family. The predicted amino acid sequence contained two N-linked glycosylation sites and 18 phosphorylation sites. Multiple sequence alignment, phylogenetic tree analysis, and three-dimensional structure modeling were conducted to clarify SjGnRHR bioinformatics characteristics. In vitro SjGnRHR expression was carried out using HEK293 cells and the pEGFP-N1 plasmid, to verify the transmembrane properties of this protein. The interaction between the S. japonica GnRH receptor and its ligand was clarified using internalization analysis. SjGnRHR transcriptional quantification confirmed the wide distribution of SjGnRHR in various S. japonica mature tissues. In addition, the transcriptional profile of SjGnRHR in the female brain and ovary during gonadal development was analyzed. Results indicate that GnRHR may be involved in diverse S. japonica physiological functions, especially in the control of reproduction.
authors.affiliation: National Engineering Research Center of Marine Facilities Aquaculture, Marine Science College, Zhejiang Ocean University, Zhoushan, Zhejiang, People's Republic of China.
authors.forename: Yun-Jun
authors.initials: YJ
authors.lastname: Yan
authors.affiliation: National Engineering Research Center of Marine Facilities Aquaculture, Marine Science College, Zhejiang Ocean University, Zhoushan, Zhejiang, People's Republic of China.
authors.forename: Tian-Ming
authors.initials: TM
authors.lastname: Wang
authors.affiliation: National Engineering Research Center of Marine Facilities Aquaculture, Marine Science College, Zhejiang Ocean University, Zhoushan, Zhejiang, People's Republic of China.
authors.forename: Wan
authors.initials: W
authors.lastname: Liu
authors.affiliation: National Engineering Research Center of Marine Facilities Aquaculture, Marine Science College, Zhejiang Ocean University, Zhoushan, Zhejiang, People's Republic of China.
authors.forename: Chang-Wen
authors.initials: CW
authors.lastname: Wu
authors.affiliation: National Engineering Research Center of Marine Facilities Aquaculture, Marine Science College, Zhejiang Ocean University, Zhoushan, Zhejiang, People's Republic of China.
authors.forename: Ai-Yi
authors.initials: AY
authors.lastname: Zhu
authors.affiliation: National Engineering Research Center of Marine Facilities Aquaculture, Marine Science College, Zhejiang Ocean University, Zhoushan, Zhejiang, People's Republic of China.
authors.forename: Chang-Feng
authors.initials: CF
authors.lastname: Chi
authors.affiliation: National Engineering Research Center of Marine Facilities Aquaculture, Marine Science College, Zhejiang Ocean University, Zhoushan, Zhejiang, People's Republic of China.
authors.forename: Zhen-Ming
authors.initials: ZM
authors.lastname: Lü
authors.affiliation: National Engineering Research Center of Marine Facilities Aquaculture, Marine Science College, Zhejiang Ocean University, Zhoushan, Zhejiang, People's Republic of China. silence84309@163.com, yangjingwen@zjou.edu.cn.
authors.forename: Jing-Wen
authors.initials: JW
authors.lastname: Yang
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D003001:Cloning, Molecular; D049832:Decapodiformes / Q000378:metabolism* / Q000502:physiology; D005260:Female; D015870:Gene Expression; D006801:Humans; D008297:Male; D008958:Models, Molecular; D009928:Organ Specificity; D010802:Phylogeny; D011966:Receptors, LHRH / Q000737:chemistry* / Q000235:genetics / Q000378:metabolism / Q000502:physiology; D012098:Reproduction; D016415:Sequence Alignment
chemical_list: D011966:Receptors, LHRH