Table 1.

Selected Structural Parameters for Urease Structures Currently Available in the PDB

PDB code	enzyme source	enzyme form	pHa	Tb (K)	metal, ligandsc	release date	flap status	resolution (Å)	ref
2KAU	K. aerogenes	wild type	7.5	298	2Ni	July 1995	closed	2.20	46
1KRA	K. aerogenes	wild type	7.5	298	–	October 1995	closed	2.30	47
1FWJ	K. aerogenes	wild type	7.5	298	2Ni, water	October 1997	closed	2.20	48
1EJX	K. aerogenes	wild type	7.5	100	2Ni, water	July 2003	disordered	1.60	unpublished
1EJW	K. aerogenes	wild type	7.5	298	2Ni, water	November 2003	closed	1.90	unpublished
1A5K	K. aerogenes	αLys217Glu	7.5	298	–	May 1998	closed	2.20	49
1A5M	K. aerogenes	αLys217Ala	7.5	298	–	May 1998	closed	2.00	49
1A5N	K. aerogenes	αLys217Ala	7.2	298	2Ni, formate	May 1998	disordered	2.40	49
1A5L	K. aerogenes	αLys217Cys αCys219Ala	7.5	298	–	May 1998	disordered	2.20	49
1A5O	K. aerogenes	αLys217Cys αCys219Ala	7.2	298	2Ni, formate	May 1998	closed	2.50	49
1FWA	K. aerogenes	αCys319Ala	7.5	298	2Ni, water	October 1997	closed	2.00	48
1FWB	K. aerogenes	αCys319Ala	6.5	298	2Ni, water	October 1997	closed	2.00	48
1FWC	K. aerogenes	αCys319Ala	8.5	298	2Ni, water	October 1997	closed	2.00	48
1FWD	K. aerogenes	αCys319Ala	9.4	298	2Ni, water	October 1997	closed	2.00	48
1FWF	K. aerogenes	αCys319Asp	7.5	298	2Ni, water	October 1997	disordered	2.00	48
1FWG	K. aerogenes	αCys319Ser	7.5	298	2Ni, water	October 1997	closed	2.00	48
1FWH	K. aerogenes	αCys319Tyr	7.5	298	2Ni, water	October 1997	open	2.00	48
1EJS	K. aerogenes	αHis219Asn	7.5	298	2Ni, water	September 2000	closed	2.00	50
1EJT	K. aerogenes	αHis219Gln	7.5	298	2Ni, water	September 2000	closed	2.00	50
1KRB	K. aerogenes	αHis219Ala	7.5	298	2Ni, water	October 1995	closed	2.50	47
1KRC	K. aerogenes	αHis320Ala	7.5	298	2Ni, water	October 1995	closed	2.50	47
1EJU	K. aerogenes	αHis320Asn	7.5	298	2Ni, water	September 2000	disordered	2.40	50
1EJV	K. aerogenes	αHis320Gln	7.5	298	2Ni, water	September 2000	disordered	2.00	50
1FWI	K. aerogenes	αHis134Ala	7.5	298	1Ni, water	October 1997	disordered	2.50	51
1EJR	K. aerogenes	αAsp221Ala	7.5	298	2Ni, water	September 2000	disordered	2.00	50
1EF2	K. aerogenes	wild type	7.5	298	2Mn, water	March 2000	closed	2.00	52
2UBP	B. pasteurii	native	6.8	100	2Ni, water	November 1999	open	2.00	53
1UBP	B. pasteurii	native	6.8	100	2Ni, BME	March 1999	open	1.65	54
3UBP	B. pasteurii	native	6.8	100	2Ni, DAP	December 1999	closed	2.00	53
4UBP	B. pasteurii	native	6.8	100	2Ni, AHA	March 2000	open	1.55	55
1IE7	B. pasteurii	native	6.8	100	2Ni, PHO	April 2001	open	1.85	56
1S3T	B. pasteurii	native	6.8	100	2Ni, H3BO3	April 2004	open	2.10	57
4AC7	B. pasteurii	native	6.8	100	2Ni, citrate	January 2013	open	1.50	58
4CEU	B. pasteurii	native	6.5	100	2Ni, water	November 2013	open	1.58	unpublished
4CEX	B. pasteurii	native	6.5	100	2Ni, fluoride	November 2013	open	1.59	unpublished
1E9Z	H. pylori	native	6.5	100	2Ni, water	November 2001	closed	3.00	59
1E9Y	H. pylori	native	6.5	100	2Ni, AHA	November 2001	open	3.00	59
3QGA	H. mustelae	native	7.4	100	2Fe	August 2011	disordered	3.00	60
3LA4	C. ensiformis	native	8.8	100	2Ni, PHO	July 2010	open	2.05	38
4H9M	C. ensiformis	native	n.a.d	n.a.	2Ni, AHA	October 2012	open	1.52	unpublished
4GY7	C. ensiformis	native	n.a.	n.a.	2Ni, PHO	November 2012	open	1.49	unpublished
4GOA	C. ensiformis	native	n.a.	n.a.	2Ni, fluoride	August 2013	open	2.20	unpublished
4G7E	C. cajan	native	n.a.	n.a.	2Ni, water	June 2013	open	2.20	61

^apH of crystallization.

^bTemperature for data collection.

^cAHA, acetohydroxamic acid; BME, β-mercaptoethanol; DAP, diamidophosphate; PHO, phosphate.

^dNot available.