| First Author | Shin DH | Year | 1991 |
| Journal | J Biol Chem | Volume | 266 |
| Issue | 35 | Pages | 23834-9 |
| PubMed ID | 1721057 | Mgi Jnum | J:24536 |
| Mgi Id | MGI:72274 | Doi | 10.1016/s0021-9258(18)54359-3 |
| Citation | Shin DH, et al. (1991) Transcriptional regulation of p90 with sequence homology to Escherichia coli glycerol-3-phosphate acyltransferase. J Biol Chem 266(35):23834-9 |
| abstractText | We have previously isolated cDNA clones for several mRNAs that are dramatically increased in livers of fasted mice refed a high carbohydrate diet. We report here the sequence and regulation of one such mRNA; the 6.8-kilobase mRNA has an open reading frame of 2481 nucleotides, and the coded protein contains 827 amino acid residues (Mr of 90,000) with a 30% identity and an additional 42% similarity in an approximately 300-amino acid stretch to Escherichia coli glycerol-3-phosphate acyltransferase. The p90 mRNA is highly expressed in liver and in adipose tissue. When previously fasted mice were refed a high carbohydrate, fat-free diet, the liver mRNA level for p90 was increased about 20-fold at 8 h. Administration of dibutyryl cAMP at the time of refeeding prevented the increase in the p90 mRNA by 70%. In addition, there was no increase in the p90 mRNA level when previously starved streptozotocin-diabetic mice were refed. In diabetic animals, the p90 mRNA level increased by 2-fold 1 h after insulin injection and reached a maximum of 19-fold after 6 h. The increase in transcription rate of the p90 gene preceded that of steady state mRNA level caused by fasting/refeeding, and cAMP abolished the increase in transcription. Transcription of the p90 gene was not detectable in either fasted or refed streptozotocin-diabetic mice, but increased 4-fold 30 min after insulin administration and further increased up to 8-fold at 2 h. On-going protein synthesis was necessary for this increase. |
