Structures of Cys319 variants and acetohydroxamate-inhibited Klebsiella aerogenes urease.

Structures of the Klebsiella Aerogenes Urease Apoenzyme and Two Active-Site Mutants

The Crystal Structure of Urease from Klebsiella Aerogenes

MELTPREKDKLLLFTAALVAERRLARGLKLNYPESVALISAFIMEGARDGKSVASLMEEGRHVLTREQVMEGVPEMIPDI
QVEATFPDGSKLVTVHNPII

MIPGEYHVKPGQIALNTGRATCRVVVENHGDRPIQVGSHYHFAEVNPALKFDRQQAAGYRLNIPAGTAVRFEPGQKREVE
LVAFAGHRAVFGFRGEVMGPLEVNDE

MSNISRQAYADMFGPTVGDKVRLADTELWIEVEDDLTTYGEEVKFGGGKVIRDGMGQGQMLAADCVDLVLTNALIVDHWG
IVKADIGVKDGRIFAIGKAGNPDIQPNVTIPIGAATEVIAAEGKIVTAGGIDTHIHWICPQQAEEALVSGVTTMVGGGTG
PAAGTHATTCTPGPWYISRMLQAADSLPVNIGLLGKGNVSQPDALREQVAAGVIGL(KCX)IHEDWGATPAAIDCALTVA
DEMDIQVALHSDTLNESGFVEDTLAAIGGRTIHTFHTEGAGGGHAPDIITACAHPNILPSSTNPTLPYTLNTIDEHLDML
MVCHHLDPDIAEDVAFAESRIRRETIAAEDVLHDLGAFSLTSSDSQAMGRVGEVILRTWQVAHRMKVQRGALAEETGDND
NFRVKRYIAKYTINPALTHGIAHEVGSIEVGKLADLVVWSPAFFGVKPATVIKGGMIAIAPMGDINASIPTPQPVHYRPM
FGALGSARHHCRLTFLSQAAAANGVAERLNLRSAIAVVKGCRTVQKADMVHNSLQPNITVDAQTYEVRVDGELITSEPAD
VLPMAQRYFLF

MSNISRQAYADMFGPTVGDKVRLADTELWIEVEDDLTTYGEEVKFGGGKVIRDGMGQGQMLAADCVDLVLTNALIVDHWG
IVKADIGVKDGRIFAIGKAGNPDIQPNVTIPIGAATEVIAAEGKIVTAGGIDTHIHWICPQQAEEALVSGVTTMVGGGTG
PAAGTHATTCTPGPWYISRMLQAADSLPVNIGLLGKGNVSQPDALREQVAAGVIGLKIHEDWGATPAAIDCALTVADEMD
IQVALHSDTLNESGFVEDTLAAIGGRTIHTFHTEGAGGGHAPDIITACAHPNILPSSTNPTLPYTLNTIDEHLDMLMVCH
HLDPDIAEDVAFAESRIRRETIAAEDVLHDLGAFSLTSSDSQAMGRVGEVILRTWQVAHRMKVQRGALAEETGDNDNFRV
KRYIAKYTINPALTHGIAHEVGSIEVGKLADLVVWSPAFFGVKPATVIKGGMIAIAPMGDINASIPTPQPVHYRPMFGAL
GSARHHCRLTFLSQAAAANGVAERLNLRSAIAVVKGCRTVQKADMVHNSLQPNITVDAQTYEVRVDGELITSEPADVLPM
AQRYFLF

THREE WATERS, 500, 501, AND 502 ARE LIGATED TO THE ACTIVE SITE NICKEL IONS. THEY MUST BE PARTIALLY OCCUPIED DUE TO CLOSE OXYGEN-OXYGEN DISTANCES BETWEEN THEM.

ALL NON-BONDED INTERACTIONS WERE REMOVED BETWEEN THE ACTIVE SITE NICKEL IONS AND NICKEL-BOUND WATERS 500, 501, 502. THE OCCUPANCIES FOR ACTIVE SITE WATERS HOH 500 - HOH 502 WERE REFINED WITH A FIXED B-FACTOR OF 20 ANGSTROMS**2. THE REFINED OCCUPANCIES FOR THESE WATERS SUGGEST NEARLY FULL OCCUPANCY FOR EACH OF THEM, ALTHOUGH THEY ARE POSITIONED TOO CLOSE (~ 2.0 ANGSTROMS APART) FOR SIMULTANEOUS OCCUPANCY.

THE OCCUPANCIES FOR ACTIVE SITE WATERS HOH 500 - HOH 502 WERE REFINED WITH A FIXED B-FACTOR OF 20 ANGSTROMS**2. THE REFINED OCCUPANCIES FOR THESE WATERS SUGGEST NEARLY FULL OCCUPANCY FOR EACH OF THEM, ALTHOUGH THEY ARE POSITIONED TOO CLOSE (~ 2.0 ANGSTROMS APART) FOR SIMULTANEOUS OCCUPANCY.

HYDROLASE(UREA AMIDO), NICKEL METALLOENZYME, HYDROLASE