1M21	Hydrolase Hydrolase Inhibitor	date	Jun 21, 2002
title	Crystal Structure Analysis Of The Peptide Amidase Pam In Com The Competitive Inhibitor Chymostatin
authors	J.Labahn, S.Neumann, G.Buldt, M.R.Kula, J.Granzin
compound		source
Molecule: Peptide Amidase Chain: A, B Synonym: Pam Ec: 3.5.1.- Engineered: Yes		Organism_scientific: Stenotrophomonas Maltophilia Organism_taxid: 40324 Expression_system: Escherichia Coli Expression_system_taxid: 562 Expression_system_vector_type: Plasmid Expression_system_plasmid: Pek06
Molecule: Chymostatin Chain: C, D Engineered: Yes		Synthetic: Yes Organism_scientific: Streptomyces Hygroscopicus, Mc521-C8 Organism_taxid: 1912
symmetry	Space Group: P 1 21 1	R_factor 0.203 R_Free 0.217
crystal cell	length a length b length c angle alpha angle beta angle gamma 74.598 62.559 102.382 90.00 90.00 90.00
method	X-Ray Diffraction	resolution	1.80 Å
ligand	CSI, PHA	enzyme	Hydrolase E.C.3.5.1 BRENDA
related structures	by homologous chain: 1M22
Primary reference	An alternative mechanism for amidase signature enzymes., Labahn J, Neumann S, Buldt G, Kula MR, Granzin J, J Mol Biol 2002 Oct 4;322(5):1053-64. PMID:12367528

Data retrieval

Asymmetric unit, PDB entry: [header only] [complete with coordinates] (158 Kb) [Save to disk] Biological Unit Coordinates (1m21.pdb1.gz) 79 Kb Biological Unit Coordinates (1m21.pdb2.gz) 78 Kb LPC: Ligand-Protein Contacts for 1M21 CSU: Contacts of Structural Units for 1M21 Likely Quarternary Molecular Structure file(s) for 1M21 Structure Factors (1021 Kb) Retrieve 1M21 in mmCIF format [Save to disk] SEQRES to COORDINATES correlation for 1M21 from S2C, [Save to disk] Re-refined 1m21 structure from PDB_REDO, a databank with updated and optimised macromolecular X-ray diffraction structure models

View 1M21 in 3D

Proteopedia, because life has more than 2D. On Jmol, a nice Rasmol like molecule viewer. This is good for easiest viewing of basic structure. On FirstGlance, an excellent tool for a guided tour on the structure components, by E. Martz.

Visual 3D analysis of 1M21

Ramachandran plot from PDBSum

Structure-derived information

Electron Density related parameters from EDS Electron Density Server, at Upsala Dipole moment, from Dipole Server at Weizmann Institute 3D motif for 1M21, from MSDmotif at EBI Classification of representative domains in scop (Structural Classification of Proteins)     - Domain d1m21a_, region A [Jmol] [rasmolscript] [script source]     - Domain d1m21b_, region B [Jmol] [rasmolscript] [script source]

Sequence-derived information

View one-letter amino acid or nucleotide sequence for each chain: [1m21_C] [1m21_A] [1m21] [1m21_D] [1m21_B] SWISS-PROT database: [Q8RJN5] Domain organization of [Q8RJN5_STEMA] by SWISSPFAM

Other resources with information on 1M21

Community annotation for 1M21 at PDBWiki (http://pdbwiki.org) MMDB (Entrez's Structure Database)

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