title: Molecular cloning and response to laminarin stimulation of arginine kinase in haemolymph in Chinese shrimp, Fenneropenaeus chinensis.
abstract: Arginine kinase (AK) was previously reported as a phosphagen-ATP phosphotransferase found in invertebrates. In this study, an 1184 bp cDNA was cloned and sequenced. It contained an open reading frame of 1068 bp that coded for 356 deduced amino acids of AK in Fenneropenaeus chinensis. The calculated molecular mass of AK is 40129.73 Da and pI is 5.92. The predicted protein showed a high level of identity to known AK in invertebrates and creatine kinase from vertebrates, which belong to a conserved family of ATP:guanidino phospho-transferases. In addition, AK protein in plasma of F. chinensis was identified using two-dimensional electrophoresis (2DE) and electrospray ionization mass spectrometry (ESI-MS) according to the calculated molecular mass and pI. AK was significantly decreased in the plasma of F. chinensis at 45 min and recovered at 3 h after laminarin injection as confirmed by 2DE and ESI-MS. The results showed that AK was one of the most significantly changed proteins on two-dimensional gel in the plasma proteins of F. chinensis at 45 min and 3 h after simulation.
authors.affiliation: Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, 7 Nanhai Road, Qingdao 266071, PR China.
authors.forename: Cui-Luan
authors.initials: CL
authors.lastname: Yao
authors.forename: Chang-Gong
authors.initials: CG
authors.lastname: Wu
authors.forename: Jian-Hai
authors.initials: JH
authors.lastname: Xiang
authors.forename: Bo
authors.initials: B
authors.lastname: Dong
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D001122:Arginine Kinase / Q000097:blood / Q000235:genetics* / Q000378:metabolism*; D001483:Base Sequence; D002681:China; D003001:Cloning, Molecular; D016000:Cluster Analysis; D017124:Conserved Sequence / Q000235:genetics; D017931:DNA Primers; D018076:DNA, Complementary / Q000235:genetics; D015180:Electrophoresis, Gel, Two-Dimensional; D004789:Enzyme Activation / Q000187:drug effects; D005936:Glucans; D006458:Hemolymph / Q000378:metabolism*; D013058:Mass Spectrometry; D008969:Molecular Sequence Data; D033561:Penaeidae / Q000201:enzymology* / Q000235:genetics*; D010802:Phylogeny; D011134:Polysaccharides / Q000494:pharmacology*; D016415:Sequence Alignment; D017422:Sequence Analysis, DNA
chemical_list: D017931:DNA Primers; D018076:DNA, Complementary; D005936:Glucans; D011134:Polysaccharides; C008247:laminaran; D001122:Arginine Kinase