The folding and solution conformation of penicillin G acylase.


Abstract

The solution conformation properties of penicillin G acylase (EC 3.5.1.11) have been characterised by near- and far-ultraviolet circular dichroism, steady-state and time-resolved fluorescence spectroscopy and differential sedimentation velocity. The enzyme (86 kDa) was found to be spherical and stable unfolding over a narrow range of urea concentrations in an apparently cooperative fashion with a mid-point of 4.5 M urea. Separation of its constituent alpha and beta peptides (23.8 kDa and 62.2 kDa, respectively) was accompanied by loss of enzyme activity and unfolding, the kinetics of unfolding being highly dependent upon urea concentration. Urea gradient gel electrophoresis showed that the separated beta peptide aggregates over a wide range of urea concentrations but that the alpha peptide refolds reversibly to a compact state. Physical studies showed that the refolded alpha peptide has a compact but asymmetric structure with more alpha helix than the native enzyme, but is more sensitive to denaturant. The latter is suggested to be due to a hydrophobic patch detected by 8-anilino-1-naphthalene sulfonic acid binding and which is normally covered by the beta peptide in the native enzyme. The results of these investigations indicate that the alpha peptide constitutes a folding domain and suggest that it plays a key role in folding of the precursor for penicillin acylase. Study holds ProTherm entries: 10027 Extra Details: conformation properties; cooperative fashion; enzyme activity;,be-ta peptide; hydrophobic patch

Submission Details

ID: 69WeiJvv3

Submitter: Connie Wang

Submission Date: April 24, 2018, 8:39 p.m.

Version: 1

Publication Details
Lindsay CD;Pain RH,Eur. J. Biochem. (1990) The folding and solution conformation of penicillin G acylase. PMID:2401288
Additional Information

Structure view and single mutant data analysis

Study data

No weblogo for data of varying length.
Colors: D E R H K S T N Q A V I L M F Y W C G P
 

Data Distribution

Studies with similar sequences (approximate matches)

Correlation with other assays (exact sequence matches)


Relevant PDB Entries

Structure ID Release Date Resolution Structure Title
1GK9 2002-01-04 1.3 Crystal structures of penicillin acylase enzyme-substrate complexes: Structural insights into the catalytic mechanism
1GKF 2002-01-04 1.41 Crystal structures of penicillin acylase enzyme-substrate complexes: Structural insights into the catalytic mechanism
1GM7 2001-11-28 1.45 Crystal structures of penicillin acylase enzyme-substrate complexes: Structural insights into the catalytic mechanism
1GM9 2001-11-28 1.8 Crystal structures of penicillin acylase enzyme-substrate complexes: Structural insights into the catalytic mechanism
1E3A 2000-11-29 1.8 A slow processing precursor penicillin acylase from Escherichia coli
1PNK 1996-03-16 1.9 PENICILLIN ACYLASE HAS A SINGLE-AMINO-ACID CATALYTIC CENTRE
1FXH 2001-03-28 1.97 MUTANT OF PENICILLIN ACYLASE IMPAIRED IN CATALYSIS WITH PHENYLACETIC ACID IN THE ACTIVE SITE
1GM8 2001-11-28 2.0 Crystal structures of penicillin acylase enzyme-substrate complexes: Structural insights into the catalytic mechanism
1H2G 2003-07-17 2.0 Altered substrate specificity mutant of penicillin acylase
1AJQ 1997-11-12 2.05 PENICILLIN ACYLASE COMPLEXED WITH THIOPHENEACETIC ACID
1K7D 2003-09-02 2.15 Penicillin Acylase with Phenyl Proprionic Acid
1FXV 2001-03-28 2.25 PENICILLIN ACYLASE MUTANT IMPAIRED IN CATALYSIS WITH PENICILLIN G IN THE ACTIVE SITE
1JX9 2003-09-02 2.28 Penicillin Acylase, mutant
1KEC 2003-09-02 2.3 PENICILLIN ACYLASE MUTANT WITH PHENYL PROPRIONIC ACID
1AJP 1997-11-12 2.31 PENICILLIN ACYLASE COMPLEXED WITH 2,5-DIHYDROXYPHENYLACETIC ACID
1K5Q 2003-09-02 2.34 PENICILLIN ACYLASE, MUTANT COMPLEXED WITH PAA
1AI4 1997-11-12 2.35 PENICILLIN ACYLASE COMPLEXED WITH 3,4-DIHYDROXYPHENYLACETIC ACID
1AJN 1997-11-12 2.36 PENICILLIN ACYLASE COMPLEXED WITH P-NITROPHENYLACETIC ACID
1AI5 1997-11-12 2.36 PENICILLIN ACYLASE COMPLEXED WITH M-NITROPHENYLACETIC ACID
1K5S 2003-09-02 2.43 PENICILLIN ACYLASE, MUTANT COMPLEXED WITH PPA
1AI7 1997-11-12 2.5 PENICILLIN ACYLASE COMPLEXED WITH PHENOL
1PNL 1996-03-16 2.5 PENICILLIN ACYLASE HAS A SINGLE-AMINO-ACID CATALYTIC CENTRE
1PNM 1996-03-16 2.5 PENICILLIN ACYLASE HAS A SINGLE-AMINO-ACID CATALYTIC CENTRE
1AI6 1997-11-12 2.55 PENICILLIN ACYLASE WITH P-HYDROXYPHENYLACETIC ACID

Relevant UniProtKB Entries

Percent Identity Matching Chains Protein Accession Entry Name
199.8 A,B Penicillin G acylase P06875 PAC_ECOLX