TY  - JOUR
TI  - The brain secretory peptides that control moulting and metamorphosis of the silkmoth, Bombyx mori.
AU  - Ishizaki, H
AU  - Suzuki, A
T2  - The International Journal of Developmental Biology
AB  - Progress made toward the elucidation of molecular features of the prothoracicotropic hormone (PTTH) of the silkmoth Bombyx mori is reviewed. PTTH stimulates the prothoracic glands to synthesize and release ecdysone, and is therefore a key hormone for the regulation of insect moulting and metamorphosis. Bombyx PTTH is a 30 kDa homodimeric glycoprotein, whose carbohydrate moiety is not essential for the biological function. The Bombyx genome contains a single copy of the PTTH gene. PTTH is produced by four dorsolateral neurosecretory cells of brain. Another Bombyx brain peptide exerting prothoracicotropic activity to a heterologous moth Samia cynthia ricini but no activity to Bombyx has been identified and termed bombyxin. Bombyxin is a 5 kDa heterodimeric peptide that shows a high similarity to insulin in the amino acid sequence. The bombyxin gene structure also shows a high similarity with the insulin gene structure. The Bombyx genome contains more than 30 copies of the bombyxin gene. Bombyxin is synthesized by eight dorsomedial neurosecretory cells of brain.
PY  - 1994
VL  - 38
IS  - 2
SP  - 301
EP  - 310
J2  - Int. J. Dev. Biol.
LA  - en
SN  - 0214-6282
SN  - 1696-3547
UR  - https://ijdb.ehu.eus/article/7981038
Y2  - 2024/12/04/20:31:41
ER  -