>sp|A0LTT2|HIS3_ACIC1 Phosphoribosyl-AMP cyclohydrolase OS=Acidothermus cellulolyticus GN=hisI MTRRPSNLDPAIAARLKRDEHGLFPAVAQQYDTGEVLMVGWMDDEALHRTLTTGRCTYWS RSRQEYWVKGETSGHQQWVKSVALDCDGDTVLVKVDQIGAACHTGDRTCFDAGQLPAVVG EPPTPVGAGERQPASGTADAAP