Human ESP1/CRP2, a member of the LIM domain protein family: characterization of the cDNA and assignment of the gene locus to chromosome 14q32.3.
The LIM domain is present in a wide variety of proteins with diverse functions and exhibits characteristic arrangements of Cys and His residues with a novel zinc-binding motif. LIM domain proteins have been implicated in development, cell regulation, and cell structure. A LIM domain protein was identified by screening a human cDNA library with rat cysteine-rich intestinal protein (CRIP) as a probe, under conditions of low stringency. Comparison of the predicted amino acid sequence with several LIM domain proteins revealed 93% of the residues to be identical to rat LIM domain protein, termed ESP1 or CRP2. Thus, the protein is hereafter referred to as human ESP1/CRP2. The cDNA encompasses a 1171-base region, including 26, 624, and 521 bases in the 5'-noncoding region, coding region, and 3'-noncoding regions, respectively, and encodes the entire ESP1/CRP2 of 208 amino acids (M(r), 22,496). Human ESP1/CRP2 protein has two LIM domains, and each shares 35.1% and 77 or 79% identical residues with human cysteine-rich protein (CRP) and rat CRIP, respectively. Northern blot analysis of ESP1/CRP2 in various human tissues showed distinct tissue distributions compared with CRP and CRIP, suggesting that each might serve related but specific roles in tissue organization or function. Using a panel of human-rodent somatic cell hybrids, the ESP1/CRP2 locus was assigned to chromosome 14. Fluorescence in situ hybridization, using cDNA and a genome DNA fragment of the ESP1/CRP2 as probes, confirms this assignment and relegates regional localization to band 14q32.3.
Karim
M A
MA
Department of Pediatrics, Kumamoto University School of Medicine, Japan.
Ohta
K
K
Egashira
M
M
Jinno
Y
Y
Niikawa
N
N
Matsuda
I
I
Indo
Y
Y
D048868:Adaptor Proteins, Signal Transducing; D000595:Amino Acid Sequence; D000818:Animals; D001483:Base Sequence; D015152:Blotting, Northern; D015139:Blotting, Southern; D002352:Carrier Proteins / Q000235:genetics; D002874:Chromosome Mapping; D002883:Chromosomes, Human, Pair 14 / Q000235:genetics; D018076:DNA, Complementary / Q000235:genetics; D004268:DNA-Binding Proteins / Q000235:genetics; D015894:Genome, Human; D006801:Humans; D006822:Hybrid Cells; D017404:In Situ Hybridization, Fluorescence; D060588:LIM Domain Proteins; D008969:Molecular Sequence Data; D009687:Nuclear Proteins; D011506:Proteins; D016271:Proto-Oncogene Proteins c-myc / Q000235:genetics*; D051381:Rats; D012097:Repressor Proteins; D012377:Rodentia; D017386:Sequence Homology, Amino Acid; D012689:Sequence Homology, Nucleic Acid
D048868:Adaptor Proteins, Signal Transducing; C486181:CRIP1 protein, human; C486176:CRIP2 protein, human; D002352:Carrier Proteins; C071434:Crip1 protein, rat; D018076:DNA, Complementary; D004268:DNA-Binding Proteins; D060588:LIM Domain Proteins; D009687:Nuclear Proteins; D011506:Proteins; D016271:Proto-Oncogene Proteins c-myc; D012097:Repressor Proteins; C084531:Tle5 protein, rat; C074370:cysteine-rich protein, mammalian