Structure and expression of bombyxin E1 gene: a novel family gene that encodes bombyxin-IV, an insect insulin-related neurosecretory peptide.
A bombyxin gene encoding precursor molecule for bombyxin-IV, one of the insulin-related neurosecretory peptide of the silkmoth Bombyx mori, has been cloned and characterized. The nucleotide sequence of this gene and its deduced amino acid sequence deviate moderately from those characterized previously for the family A, B, C and D bombyxin genes. The gene encoding the bombyxin-IV precursor was therefore defined into a novel family E and designated as gene E1. The bombyxin E1 transcript in Bombyx brain was shown to locate in four pairs of medial neurosecretory cells, which also produce other bombyxin family mRNAs, and the amount of the E1 transcript did not change markedly during the fifth larval instar. Genomic Southern hybridization indicated that the Bombyx haploid genome contained a single copy of the bombyxin family E gene.
Tsuzuki
S
S
Department of Biology, School of Science, Nagoya University, Japan.
Masuta
T
T
Furuno
M
M
Sakurai
S
S
Iwami
M
M
D000595:Amino Acid Sequence; D000818:Animals; D001483:Base Sequence; D012831:Bombyx; D001923:Brain Chemistry; D006238:Haploidy; D017403:In Situ Hybridization; D007301:Insect Hormones / Q000235:genetics*; D019476:Insect Proteins / Q000235:genetics*; D008969:Molecular Sequence Data; D009419:Nerve Tissue Proteins / Q000235:genetics*; D009479:Neuropeptides / Q000235:genetics*; D012333:RNA, Messenger / Q000378:metabolism
D007301:Insect Hormones; D019476:Insect Proteins; D009419:Nerve Tissue Proteins; D009479:Neuropeptides; D012333:RNA, Messenger; C108049:bombyxin E1 protein, Bombyx mori; C063879:insulin-related neuropeptide; C064115:bombyxin IV protein, Bombyx mori