Crystallization and preliminary X‐ray diffraction studies on recombinant isopenicillin N synthase from Aspergillus nidulans
Recombinant Aspergillus nidulans isopenicillin N synthase was purified from an Escherichia coli expression system. The apoenzyme in the presence of saturating concentrations of MnCl2 could be crystallized by either macro‐ or microseeding, using the hanging drop vapor diffusion technique with polyeth...
Saved in:
Published in | Protein science Vol. 4; no. 5; pp. 1007 - 1009 |
---|---|
Main Authors | , , , , |
Format | Journal Article |
Language | English |
Published |
Bristol
Cold Spring Harbor Laboratory Press
01.05.1995
|
Subjects | |
Online Access | Get full text |
Cover
Loading…
Summary: | Recombinant Aspergillus nidulans isopenicillin N synthase was purified from an Escherichia coli expression system. The apoenzyme in the presence of saturating concentrations of MnCl2 could be crystallized by either macro‐ or microseeding, using the hanging drop vapor diffusion technique with polyethylene glycol 8000 as precipitant. The crystals (0.5–1.0 mm overall dimensions) diffract X‐rays to at least 2.0 Å resolution at synchrotrons and belong to space group P212121 with unit cell dimensions of a = 59.2 Å, b = 127.0 Å, and c = 139.6 Å. The asymmetric unit contains one dimer, and the solvent content of the crystals is 60%. The crystals are radiation sensitive. |
---|---|
Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 0961-8368 1469-896X |
DOI: | 10.1002/pro.5560040521 |