Structure of the human cellular retinoic acid-binding protein II gene. Early transcriptional regulation by retinoic acid

J Biol Chem. 1992 Dec 15;267(35):25251-5.

Abstract

The gene for human cellular retinoic acid-binding protein II (CRABP-II) has been cloned. It was isolated from a human placenta genomic library and is contained within one bacteriophage clone. The gene spans 6 kilobases and consists of 4 exons. One major transcription initiation site was mapped to an A residue 137 nucleotides upstream of the ATG initiation codon. The upstream region contains a TATA box and potential AP2, Sp1, and Krox-24 binding sites, as well as a direct repeat with homology to a retinoic acid-responsive element. The CRABP-II mRNA was rapidly induced within 2-6 h in cultured human skin fibroblasts by retinoic acid, reaching a plateau after 6 h of treatment. The rapid increase of CRABP-II message was mainly due to an increased rate of transcription as determined by nuclear run-on experiments. Increased transcription could be detected as early as 1 h after addition of retinoic acid, peaked at 2 h, and returned to basal levels within 6 h. On-going protein synthesis was required for this transient increase of transcription, since the induction was blocked by cycloheximide. These data suggest that the human CRABP-II gene is transcriptionally regulated by a newly synthesized regulatory protein.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Amino Acid Sequence
  • Base Sequence
  • Binding Sites
  • Blotting, Northern
  • Carrier Proteins / genetics*
  • Cell Nucleus / drug effects
  • Cell Nucleus / metabolism
  • Cells, Cultured
  • Codon
  • Cycloheximide / pharmacology
  • DNA / genetics
  • DNA / metabolism
  • Dactinomycin / pharmacology
  • Female
  • Fibroblasts / drug effects
  • Fibroblasts / metabolism
  • Gene Expression Regulation / drug effects*
  • Genomic Library
  • Humans
  • Molecular Sequence Data
  • Placenta / physiology
  • Pregnancy
  • RNA, Messenger / genetics
  • RNA, Messenger / isolation & purification
  • RNA, Messenger / metabolism
  • Receptors, Retinoic Acid
  • Restriction Mapping
  • Skin / metabolism*
  • TATA Box
  • Transcription Factors / metabolism
  • Transcription, Genetic / drug effects*
  • Tretinoin / pharmacology*

Substances

  • Carrier Proteins
  • Codon
  • RNA, Messenger
  • Receptors, Retinoic Acid
  • Transcription Factors
  • Dactinomycin
  • Tretinoin
  • DNA
  • Cycloheximide

Associated data

  • GENBANK/D10519
  • GENBANK/D10520
  • GENBANK/D12749
  • GENBANK/D12750
  • GENBANK/D12751
  • GENBANK/D12752
  • GENBANK/D12753
  • GENBANK/M83144
  • GENBANK/M97814
  • GENBANK/M97815