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(-) Description

Title :  WILD-TYPE PENICILLIN-BINDING PROTEIN 5 FROM E. COLI MODIFIED BY BETA-MERCAPTOETHANOL
 
Authors :  G. Nicola, R. A. Nicholas, C. Davies
Date :  19 Feb 03  (Deposition) - 02 Mar 04  (Release) - 09 Jun 09  (Revision)
Method :  X-RAY DIFFRACTION
Resolution :  2.00
Chains :  Asym./Biol. Unit :  A
Keywords :  Peptidoglycan Synthesis, Penicillin-Binding Protein, Dd- Carboxypeptidase, Hydrolase (Keyword Search: [Gene Ontology, PubMed, Web (Google))
 
Reference :  G. Nicola, A. Fedarovich, R. A. Nicholas, C. Davies
A Large Displacement Of The Sxn Motif Of Cys115-Modified Penicillin-Binding Protein 5 From Escherichia Coli.
Biochem. J. V. 392 55 2005
PubMed-ID: 16038617  |  Reference-DOI: 10.1042/BJ20050449
(for further references see the PDB file header)

(-) Compounds

Molecule 1 - PENICILLIN-BINDING PROTEIN 5
    ChainsA
    EC Number3.4.16.4
    EngineeredYES
    Expression SystemESCHERICHIA COLI
    Expression System PlasmidPBR322
    Expression System StrainMC1061
    Expression System Taxid562
    Expression System Vector TypePLASMID
    GeneDACA
    Organism ScientificESCHERICHIA COLI
    Organism Taxid562
    SynonymD-ALANYL-D-ALANINE CARBOXYPEPTIDASE FRACTION A, DD-PEPTIDASE, DD-CARBOXYPEPTIDASE, PBP-5

 Structural Features

(-) Chains, Units

  1
Asymmetric/Biological Unit A

Summary Information (see also Sequences/Alignments below)

(-) Ligands, Modified Residues, Ions  (1, 1)

Asymmetric/Biological Unit (1, 1)
No.NameCountTypeFull Name
1BME1Ligand/IonBETA-MERCAPTOETHANOL

(-) Sites  (1, 1)

Asymmetric Unit (1, 1)
No.NameEvidenceResiduesDescription
1AC1SOFTWAREILE A:54 , LEU A:102 , ILE A:106 , CYS A:115 , HOH A:427BINDING SITE FOR RESIDUE BME A 400

(-) SS Bonds  (0, 0)

(no "SS Bond" information available for 1NZU)

(-) Cis Peptide Bonds  (2, 2)

Asymmetric/Biological Unit
No.Residues
1Gly A:211 -Ile A:212
2Ala A:321 -Pro A:322

 Sequence-Structure Mapping

(-) SAPs(SNPs)/Variants  (1, 1)

Asymmetric/Biological Unit (1, 1)
  dbSNPPDB
No.SourceVariant IDVariantUniProt IDStatusIDChainVariant
1UniProtVAR_DACA_ECOLI_001 *G134DDACA_ECOLI  ---  ---AG105D
   * ID not provided by source

  SNP/SAP Summary Statistics (UniProtKB/Swiss-Prot)

(-) PROSITE Motifs  (0, 0)

(no "PROSITE Motif" information available for 1NZU)

(-) Exons   (0, 0)

(no "Exon" information available for 1NZU)

(-) Sequences/Alignments

Asymmetric/Biological Unit
   Reformat: Number of residues per line =  ('0' or empty: single-line sequence representation)
  Number of residues per labelling interval =   
  UniProt sequence: complete  aligned part    
   Show mapping: SCOP domains CATH domains Pfam domains Secondary structure (by author)
SAPs(SNPs) PROSITE motifs Exons
(details for a mapped element are shown in a popup box when the mouse pointer rests over it)
Chain A from PDB  Type:PROTEIN  Length:347
 aligned with DACA_ECO57 | P0AEB4 from UniProtKB/Swiss-Prot  Length:403

    Alignment length:353
                                    41        51        61        71        81        91       101       111       121       131       141       151       161       171       181       191       201       211       221       231       241       251       261       271       281       291       301       311       321       331       341       351       361       371       381   
           DACA_ECO57    32 LNIKTMIPGVPQIDAESYILIDYNSGKVLAEQNADVRRDPASLTKMMTSYVIGQAMKAGKFKETDLVTIGNDAWATGNPVFKGSSLMFLKPGMQVPVSQLIRGINLQSGNDACVAMADFAAGSQDAFVGLMNSYVNALGLKNTHFQTVHGLDADGQYSSARDMALIGQALIRDVPNEYSIYKEKEFTFNGIRQLNRNGLLWDNSLNVDGIKTGHTDKAGYNLVASATEGQMRLISAVMGGRTFKGREAESKKLLTWGFRFFETVNPLKVGKEFASEPVWFGDSDRASLGVDKDVYLTIPRGRMKDLKASYVLNSSELHAPLQKNQVVGTINFQLDGKTIEQRPLVVLQEIPEG 384
               SCOP domains d1nzua2 A:3-262 Penicillin-binding protein 5, N-terminal domain                                                                                                                                                                                                     d1nzua1 A:263-355 Penicillin-binding protein 5, C-terminal domain                             SCOP domains
               CATH domains 1nzuA01 A:3-262 DD-peptidase/beta-lactamase superfamily                                                                                                                                                                                                             1nzuA02 A:263-354 Peptidoglycan synthesis regulatory factor (PBP3), Domain 2                - CATH domains
               Pfam domains ---Peptidase_S11-1nzuA01 A:6-244                                                                                                                                                                                                                  ------------------PBP5_C-1nzuA02 A:263-354                                                                    - Pfam domains
         Sec.struct. author hhhhhh........eeeeeeee.....eeeee.......hhhhhhhhhhhhhhhhhhh.......eee.hhhhhh.------...........eeehhhhhhhhhh..hhhhhhhhhhhhhhhhhhhhhhhhhhhhhh....................hhhhhhhhhhhhhhhhhhhhhhhhh.eeee..eeee..hhhhhh...eeeeeeeeee...eeeeeeeeee..eeeeeeeeee...hhhhhhhhhhhhhhhhheeeeeee......eeeeee.....eeeee....eeeeee..hhhhheeeeee....ee.......eeeeeeeee..eeeeeeeeee....... Sec.struct. author
                 SAPs(SNPs) ------------------------------------------------------------------------------------------------------D---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- PROSITE
                 Transcript ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 1nzu A   3 LNIKTMIPGVPQIDAESYILIDYNSGKVLAEQNADVRRDPASLTKMMTSYVIGQAMKAGKFKETDLVTIGNDAWAT------GSSLMFLKPGMQVPVSQLIRGINLQSGNDACVAMADFAAGSQDAFVGLMNSYVNALGLKNTHFQTVHGLDADGQYSSARDMALIGQALIRDVPNEYSIYKEKEFTFNGIRQLNRNGLLWDNSLNVDGIKTGHTDKAGYNLVASATEGQMRLISAVMGGRTFKGREAESKKLLTWGFRFFETVNPLKVGKEFASEPVWFGDSDRASLGVDKDVYLTIPRGRMKDLKASYVLNSSELHAPLQKNQVVGTINFQLDGKTIEQRPLVVLQEIPEG 355
                                    12        22        32        42        52        62        72     |   -  |     92       102       112       122       132       142       152       162       172       182       192       202       212       222       232       242       252       262       272       282       292       302       312       322       332       342       352   
                                                                                                      78     85                                                                                                                                                                                                                                                                              

Chain A from PDB  Type:PROTEIN  Length:347
 aligned with DACA_ECOL6 | P0AEB3 from UniProtKB/Swiss-Prot  Length:403

    Alignment length:353
                                    41        51        61        71        81        91       101       111       121       131       141       151       161       171       181       191       201       211       221       231       241       251       261       271       281       291       301       311       321       331       341       351       361       371       381   
           DACA_ECOL6    32 LNIKTMIPGVPQIDAESYILIDYNSGKVLAEQNADVRRDPASLTKMMTSYVIGQAMKAGKFKETDLVTIGNDAWATGNPVFKGSSLMFLKPGMQVPVSQLIRGINLQSGNDACVAMADFAAGSQDAFVGLMNSYVNALGLKNTHFQTVHGLDADGQYSSARDMALIGQALIRDVPNEYSIYKEKEFTFNGIRQLNRNGLLWDNSLNVDGIKTGHTDKAGYNLVASATEGQMRLISAVMGGRTFKGREAESKKLLTWGFRFFETVNPLKVGKEFASEPVWFGDSDRASLGVDKDVYLTIPRGRMKDLKASYVLNSSELHAPLQKNQVVGTINFQLDGKTIEQRPLVVLQEIPEG 384
               SCOP domains d1nzua2 A:3-262 Penicillin-binding protein 5, N-terminal domain                                                                                                                                                                                                     d1nzua1 A:263-355 Penicillin-binding protein 5, C-terminal domain                             SCOP domains
               CATH domains 1nzuA01 A:3-262 DD-peptidase/beta-lactamase superfamily                                                                                                                                                                                                             1nzuA02 A:263-354 Peptidoglycan synthesis regulatory factor (PBP3), Domain 2                - CATH domains
               Pfam domains ---Peptidase_S11-1nzuA01 A:6-244                                                                                                                                                                                                                  ------------------PBP5_C-1nzuA02 A:263-354                                                                    - Pfam domains
         Sec.struct. author hhhhhh........eeeeeeee.....eeeee.......hhhhhhhhhhhhhhhhhhh.......eee.hhhhhh.------...........eeehhhhhhhhhh..hhhhhhhhhhhhhhhhhhhhhhhhhhhhhh....................hhhhhhhhhhhhhhhhhhhhhhhhh.eeee..eeee..hhhhhh...eeeeeeeeee...eeeeeeeeee..eeeeeeeeee...hhhhhhhhhhhhhhhhheeeeeee......eeeeee.....eeeee....eeeeee..hhhhheeeeee....ee.......eeeeeeeee..eeeeeeeeee....... Sec.struct. author
                 SAPs(SNPs) ------------------------------------------------------------------------------------------------------D---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- PROSITE
                 Transcript ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 1nzu A   3 LNIKTMIPGVPQIDAESYILIDYNSGKVLAEQNADVRRDPASLTKMMTSYVIGQAMKAGKFKETDLVTIGNDAWAT------GSSLMFLKPGMQVPVSQLIRGINLQSGNDACVAMADFAAGSQDAFVGLMNSYVNALGLKNTHFQTVHGLDADGQYSSARDMALIGQALIRDVPNEYSIYKEKEFTFNGIRQLNRNGLLWDNSLNVDGIKTGHTDKAGYNLVASATEGQMRLISAVMGGRTFKGREAESKKLLTWGFRFFETVNPLKVGKEFASEPVWFGDSDRASLGVDKDVYLTIPRGRMKDLKASYVLNSSELHAPLQKNQVVGTINFQLDGKTIEQRPLVVLQEIPEG 355
                                    12        22        32        42        52        62        72     |   -  |     92       102       112       122       132       142       152       162       172       182       192       202       212       222       232       242       252       262       272       282       292       302       312       322       332       342       352   
                                                                                                      78     85                                                                                                                                                                                                                                                                              

Chain A from PDB  Type:PROTEIN  Length:347
 aligned with DACA_ECOLI | P0AEB2 from UniProtKB/Swiss-Prot  Length:403

    Alignment length:353
                                    41        51        61        71        81        91       101       111       121       131       141       151       161       171       181       191       201       211       221       231       241       251       261       271       281       291       301       311       321       331       341       351       361       371       381   
           DACA_ECOLI    32 LNIKTMIPGVPQIDAESYILIDYNSGKVLAEQNADVRRDPASLTKMMTSYVIGQAMKAGKFKETDLVTIGNDAWATGNPVFKGSSLMFLKPGMQVPVSQLIRGINLQSGNDACVAMADFAAGSQDAFVGLMNSYVNALGLKNTHFQTVHGLDADGQYSSARDMALIGQALIRDVPNEYSIYKEKEFTFNGIRQLNRNGLLWDNSLNVDGIKTGHTDKAGYNLVASATEGQMRLISAVMGGRTFKGREAESKKLLTWGFRFFETVNPLKVGKEFASEPVWFGDSDRASLGVDKDVYLTIPRGRMKDLKASYVLNSSELHAPLQKNQVVGTINFQLDGKTIEQRPLVVLQEIPEG 384
               SCOP domains d1nzua2 A:3-262 Penicillin-binding protein 5, N-terminal domain                                                                                                                                                                                                     d1nzua1 A:263-355 Penicillin-binding protein 5, C-terminal domain                             SCOP domains
               CATH domains 1nzuA01 A:3-262 DD-peptidase/beta-lactamase superfamily                                                                                                                                                                                                             1nzuA02 A:263-354 Peptidoglycan synthesis regulatory factor (PBP3), Domain 2                - CATH domains
               Pfam domains ---Peptidase_S11-1nzuA01 A:6-244                                                                                                                                                                                                                  ------------------PBP5_C-1nzuA02 A:263-354                                                                    - Pfam domains
         Sec.struct. author hhhhhh........eeeeeeee.....eeeee.......hhhhhhhhhhhhhhhhhhh.......eee.hhhhhh.------...........eeehhhhhhhhhh..hhhhhhhhhhhhhhhhhhhhhhhhhhhhhh....................hhhhhhhhhhhhhhhhhhhhhhhhh.eeee..eeee..hhhhhh...eeeeeeeeee...eeeeeeeeee..eeeeeeeeee...hhhhhhhhhhhhhhhhheeeeeee......eeeeee.....eeeee....eeeeee..hhhhheeeeee....ee.......eeeeeeeee..eeeeeeeeee....... Sec.struct. author
                 SAPs(SNPs) ------------------------------------------------------------------------------------------------------D---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- PROSITE
                 Transcript ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 1nzu A   3 LNIKTMIPGVPQIDAESYILIDYNSGKVLAEQNADVRRDPASLTKMMTSYVIGQAMKAGKFKETDLVTIGNDAWAT------GSSLMFLKPGMQVPVSQLIRGINLQSGNDACVAMADFAAGSQDAFVGLMNSYVNALGLKNTHFQTVHGLDADGQYSSARDMALIGQALIRDVPNEYSIYKEKEFTFNGIRQLNRNGLLWDNSLNVDGIKTGHTDKAGYNLVASATEGQMRLISAVMGGRTFKGREAESKKLLTWGFRFFETVNPLKVGKEFASEPVWFGDSDRASLGVDKDVYLTIPRGRMKDLKASYVLNSSELHAPLQKNQVVGTINFQLDGKTIEQRPLVVLQEIPEG 355
                                    12        22        32        42        52        62        72     |   -  |     92       102       112       122       132       142       152       162       172       182       192       202       212       222       232       242       252       262       272       282       292       302       312       322       332       342       352   
                                                                                                      78     85                                                                                                                                                                                                                                                                              

   Legend:   → Mismatch (orange background)
  - → Gap (green background, '-', border residues have a numbering label)
    → Modified Residue (blue background, lower-case, 'x' indicates undefined single-letter code, labelled with number + name)
  x → Chemical Group (purple background, 'x', labelled with number + name, e.g. ACE or NH2)
  extra numbering lines below/above indicate numbering irregularities and modified residue names etc., number ends below/above '|'

 Classification and Annotation

(-) SCOP Domains  (2, 2)

Asymmetric/Biological Unit

(-) CATH Domains  (2, 2)

Asymmetric/Biological Unit
(-)
Class: Alpha Beta (26913)
(-)
Class: Mainly Beta (13760)

(-) Pfam Domains  (2, 2)

Asymmetric/Biological Unit

(-) Gene Ontology  (16, 36)

Asymmetric/Biological Unit(hide GO term definitions)
Chain A   (DACA_ECO57 | P0AEB4)
molecular function
    GO:0004180    carboxypeptidase activity    Catalysis of the hydrolysis of the terminal or penultimate peptide bond at the C-terminal end of a peptide or polypeptide.
    GO:0016787    hydrolase activity    Catalysis of the hydrolysis of various bonds, e.g. C-O, C-N, C-C, phosphoric anhydride bonds, etc. Hydrolase is the systematic name for any enzyme of EC class 3.
    GO:0008233    peptidase activity    Catalysis of the hydrolysis of a peptide bond. A peptide bond is a covalent bond formed when the carbon atom from the carboxyl group of one amino acid shares electrons with the nitrogen atom from the amino group of a second amino acid.
    GO:0009002    serine-type D-Ala-D-Ala carboxypeptidase activity    Catalysis of the reaction: (Ac)2-L-Lys-D-alanyl-D-alanine + H2O = (Ac)2-L-Lys-D-alanine + D-alanine.
biological process
    GO:0071555    cell wall organization    A process that results in the assembly, arrangement of constituent parts, or disassembly of the cell wall, the rigid or semi-rigid envelope lying outside the cell membrane of plant, fungal and most prokaryotic cells, maintaining their shape and protecting them from osmotic lysis.
    GO:0009252    peptidoglycan biosynthetic process    The chemical reactions and pathways resulting in the formation of peptidoglycans, any of a class of glycoconjugates found in bacterial cell walls.
    GO:0006508    proteolysis    The hydrolysis of proteins into smaller polypeptides and/or amino acids by cleavage of their peptide bonds.
    GO:0008360    regulation of cell shape    Any process that modulates the surface configuration of a cell.
cellular component
    GO:0016020    membrane    A lipid bilayer along with all the proteins and protein complexes embedded in it an attached to it.
    GO:0005886    plasma membrane    The membrane surrounding a cell that separates the cell from its external environment. It consists of a phospholipid bilayer and associated proteins.

Chain A   (DACA_ECOL6 | P0AEB3)
molecular function
    GO:0004180    carboxypeptidase activity    Catalysis of the hydrolysis of the terminal or penultimate peptide bond at the C-terminal end of a peptide or polypeptide.
    GO:0016787    hydrolase activity    Catalysis of the hydrolysis of various bonds, e.g. C-O, C-N, C-C, phosphoric anhydride bonds, etc. Hydrolase is the systematic name for any enzyme of EC class 3.
    GO:0008233    peptidase activity    Catalysis of the hydrolysis of a peptide bond. A peptide bond is a covalent bond formed when the carbon atom from the carboxyl group of one amino acid shares electrons with the nitrogen atom from the amino group of a second amino acid.
    GO:0009002    serine-type D-Ala-D-Ala carboxypeptidase activity    Catalysis of the reaction: (Ac)2-L-Lys-D-alanyl-D-alanine + H2O = (Ac)2-L-Lys-D-alanine + D-alanine.
biological process
    GO:0071555    cell wall organization    A process that results in the assembly, arrangement of constituent parts, or disassembly of the cell wall, the rigid or semi-rigid envelope lying outside the cell membrane of plant, fungal and most prokaryotic cells, maintaining their shape and protecting them from osmotic lysis.
    GO:0009252    peptidoglycan biosynthetic process    The chemical reactions and pathways resulting in the formation of peptidoglycans, any of a class of glycoconjugates found in bacterial cell walls.
    GO:0006508    proteolysis    The hydrolysis of proteins into smaller polypeptides and/or amino acids by cleavage of their peptide bonds.
    GO:0008360    regulation of cell shape    Any process that modulates the surface configuration of a cell.
cellular component
    GO:0016020    membrane    A lipid bilayer along with all the proteins and protein complexes embedded in it an attached to it.
    GO:0005886    plasma membrane    The membrane surrounding a cell that separates the cell from its external environment. It consists of a phospholipid bilayer and associated proteins.

Chain A   (DACA_ECOLI | P0AEB2)
molecular function
    GO:0008800    beta-lactamase activity    Catalysis of the reaction: a beta-lactam + H2O = a substituted beta-amino acid.
    GO:0004180    carboxypeptidase activity    Catalysis of the hydrolysis of the terminal or penultimate peptide bond at the C-terminal end of a peptide or polypeptide.
    GO:0004175    endopeptidase activity    Catalysis of the hydrolysis of internal, alpha-peptide bonds in a polypeptide chain.
    GO:0016787    hydrolase activity    Catalysis of the hydrolysis of various bonds, e.g. C-O, C-N, C-C, phosphoric anhydride bonds, etc. Hydrolase is the systematic name for any enzyme of EC class 3.
    GO:0008658    penicillin binding    Interacting selectively and non-covalently with penicillin, any antibiotic that contains the condensed beta-lactamthiazolidine ring system.
    GO:0008233    peptidase activity    Catalysis of the hydrolysis of a peptide bond. A peptide bond is a covalent bond formed when the carbon atom from the carboxyl group of one amino acid shares electrons with the nitrogen atom from the amino group of a second amino acid.
    GO:0009002    serine-type D-Ala-D-Ala carboxypeptidase activity    Catalysis of the reaction: (Ac)2-L-Lys-D-alanyl-D-alanine + H2O = (Ac)2-L-Lys-D-alanine + D-alanine.
biological process
    GO:0044036    cell wall macromolecule metabolic process    The chemical reactions and pathways involving macromolecules forming, or destined to form, part of the cell wall. A cell wall is a rigid or semi-rigid envelope lying outside the cell membrane of plant, fungal and most prokaryotic cells, maintaining their shape and protecting them from osmotic lysis.
    GO:0071555    cell wall organization    A process that results in the assembly, arrangement of constituent parts, or disassembly of the cell wall, the rigid or semi-rigid envelope lying outside the cell membrane of plant, fungal and most prokaryotic cells, maintaining their shape and protecting them from osmotic lysis.
    GO:0009252    peptidoglycan biosynthetic process    The chemical reactions and pathways resulting in the formation of peptidoglycans, any of a class of glycoconjugates found in bacterial cell walls.
    GO:0000270    peptidoglycan metabolic process    The chemical reactions and pathways involving peptidoglycans, any of a class of glycoconjugates found only in bacterial cell walls and consisting of strands of glycosaminoglycan cross-linked by oligopeptides to form a huge and rigid network.
    GO:0006508    proteolysis    The hydrolysis of proteins into smaller polypeptides and/or amino acids by cleavage of their peptide bonds.
    GO:0008360    regulation of cell shape    Any process that modulates the surface configuration of a cell.
cellular component
    GO:0005887    integral component of plasma membrane    The component of the plasma membrane consisting of the gene products and protein complexes having at least some part of their peptide sequence embedded in the hydrophobic region of the membrane.
    GO:0016020    membrane    A lipid bilayer along with all the proteins and protein complexes embedded in it an attached to it.
    GO:0005886    plasma membrane    The membrane surrounding a cell that separates the cell from its external environment. It consists of a phospholipid bilayer and associated proteins.

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 Related Entries

(-) Entries Sharing at Least One Protein Chain (UniProt ID)

UniProtKB/Swiss-Prot
        DACA_ECO57 | P0AEB41hd8 1nj4 1nzo 1sdn 1z6f
        DACA_ECOL6 | P0AEB31hd8 1nj4 1nzo 1sdn 1z6f
        DACA_ECOLI | P0AEB21hd8 1nj4 1nzo 1sdn 1z6f 3beb 3bec 3mzd 3mze 3mzf 5j8x

(-) Related Entries Specified in the PDB File

1hd8 CRYSTAL STRUCTURE OF A DEACYLATION-DEFECTIVE MUTANT OF PENICILLIN-BINDING PROTEIN 5 AT 2.3 A RESOLUTION
1nj4 CRYSTAL STRUCTURE OF A DEACYLATION-DEFECTIVE MUTANT OF PENICILLIN-BINDING PROTEIN 5 AT 1.9 A RESOLUTION
1nzo THE CRYSTAL STRUCTURE OF WILD TYPE PENICILLIN-BINDING PROTEIN 5 FROM E. COLI