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(-) Description

Title :  NMR STRUCTURE OF A PROTEIN-DNA COMPLEX OF AN ALTERED SPECIFICITY MUTANT OF THE LAC REPRESSOR HEADPIECE THAT MIMICS THE GAL REPRESSOR
 
Authors :  R. K. Salinas, G. E. Folkers, A. M. J. J. Bonvin, D. Das, R. Boelens, R. Kaptein
Date :  01 Feb 05  (Deposition) - 18 Oct 05  (Release) - 24 Feb 09  (Revision)
Method :  SOLUTION NMR
Resolution :  NOT APPLICABLE
Chains :  NMR Structure  :  A,B,C,D  (16x)
Keywords :  Transcription Regulator, Symmetric Dna-Binding, Dna-Binding, Hth, Lac Operon, Lac Repressor, Altered Specificity, Mutant, Repressor, Transcription Regulation, Transcription Regulator/Dna, Nmr, Gal Repressor, Gal Operon, Lac Headpiece, Symmetric Dimer (Keyword Search: [Gene Ontology, PubMed, Web (Google)] )
 
Reference :  R. K. Salinas, G. E. Folkers, A. M. J. J. Bonvin, D. Das, R. Boelens, R. Kaptein
Altered Specificity In Dna Binding By The Lac Repressor: A Mutant Lac Headpiece That Mimics The Gal Repressor
Chembiochem V. 6 1628 2005
PubMed-ID: 16094693  |  Reference-DOI: 10.1002/CBIC.200500049
(for further references see the PDB file header)

(-) Compounds

Molecule 1 - LACTOSE OPERON REPRESSOR
    Chains: A, B
    Engineered: YES
    Expression System: ESCHERICHIA COLI
    Expression System Plasmid: PET3A / PGP1-2
    Expression System Strain: DH9
    Expression System Taxid: 562
    Fragment: DNA BINDING DOMAIN, LAC HEADPIECE RESIDUES 1-62
    Mutation: YES
    Organism Scientific: ESCHERICHIA COLI
    Organism Taxid: 562
    Other Details: THE PROTEIN IS A DIMER. DISULFIDE BOND BETWEEN CYS52 IN TWO MONOMERS FORMS A COVALENT DIMER
    Strain: DH9
 
Molecule 2 - 5'-D(*GP*AP*AP*TP*TP*GP*TP*AP*AP*GP *CP*GP*CP*TP*TP*AP*CP*AP*AP*TP*TP*C)-3'
    Chains: C, D
    Other Details: ALTERED LAC SYML OPERATOR
    Synonym: LAC-GAL OPERATOR
    Synthetic: YES

 Structural Features

(-) Chains, Units

  
NMR Structure (16x): 

Summary Information (see also Sequences/Alignments below)

(-) Ligands, Modified Residues, Ions  (0, 0)

(no "Ligand,Modified Residues,Ions" information available for 2BJC)

(-) Sites  (0, 0)

(no "Site" information available for 2BJC)

(-) SS Bonds  (1, 1)

NMR Structure
No.Residues
1A:52 -B:152

(-) Cis Peptide Bonds  (0, 0)

(no "Cis Peptide Bond" information available for 2BJC)

 Sequence-Structure Mapping

(-) SAPs(SNPs)/Variants  (0, 0)

(no "SAP(SNP)/Variant" information available for 2BJC)

(-) PROSITE Motifs  (2, 4)

NMR Structure (2, 4)
 PROSITEUniProtKBPDB
No.IDACDescriptionIDLocationCountLocation
1HTH_LACI_2PS50932 LacI-type HTH domain profile.LACI_ECOLI4-58
 		  2A:4-58
B:104-158
2HTH_LACI_1PS00356 LacI-type HTH domain signature.LACI_ECOLI6-24
 		  2A:6-24
B:106-124

(-) Exons   (0, 0)

(no "Exon" information available for 2BJC)

(-) Sequences/Alignments

NMR Structure
   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:62
 aligned with LACI_ECOLI | P03023 from UniProtKB/Swiss-Prot  Length:360

    Alignment length:62
                                    10        20        30        40        50        60  
           LACI_ECOLI     1 MKPVTLYDVAEYAGVSYQTVSRVVNQASHVSAKTREKVEAAMAELNYIPNRVAQQLAGKQSL  62
               SCOP domains d2bjca1 A:1-62 Lac repressor (LacR), N-terminal domain         SCOP domains
               CATH domains 2bjcA00 A:1-62 lambda repressor-like DNA-binding domains       CATH domains
               Pfam domains -------------------------------------------------------------- Pfam domains
         Sec.struct. author ....hhhhhhhhh...hhhhhhhhh......hhhhhhhhhhhhhh.......hhhhhh.... Sec.struct. author
                 SAPs(SNPs) -------------------------------------------------------------- SAPs(SNPs)
                PROSITE (1) ---HTH_LACI_2  PDB: A:4-58 UniProt: 4-58                  ---- PROSITE (1)
                PROSITE (2) -----HTH_LACI_1         -------------------------------------- PROSITE (2)
                 Transcript -------------------------------------------------------------- Transcript
                 2bjc A   1 MKPVTLYDVAEYAGVSVATVSRVVNQASHVSAKTREKVEAAMAELNYIPNRCAQQLAGKQSL  62
                                    10        20        30        40        50        60  


Chain B from PDB  Type:PROTEIN  Length:62
 aligned with LACI_ECOLI | P03023 from UniProtKB/Swiss-Prot  Length:360

    Alignment length:62
                                    10        20        30        40        50        60  
           LACI_ECOLI     1 MKPVTLYDVAEYAGVSYQTVSRVVNQASHVSAKTREKVEAAMAELNYIPNRVAQQLAGKQSL  62
               SCOP domains d2bjcb_ B: Lac repressor (LacR), N-terminal domain             SCOP domains
               CATH domains 2bjcB00 B:101-162 lambda repressor-like DNA-binding domains    CATH domains
               Pfam domains -------------------------------------------------------------- Pfam domains
         Sec.struct. author ....hhhhhhhhh...hhhhhhhhh......hhhhhhhhhhhhhh.......hhhhhh.... Sec.struct. author
                 SAPs(SNPs) -------------------------------------------------------------- SAPs(SNPs)
                PROSITE (1) ---HTH_LACI_2  PDB: B:104-158 UniProt: 4-58               ---- PROSITE (1)
                PROSITE (2) -----HTH_LACI_1         -------------------------------------- PROSITE (2)
                 Transcript -------------------------------------------------------------- Transcript
                 2bjc B 101 MKPVTLYDVAEYAGVSVATVSRVVNQASHVSAKTREKVEAAMAELNYIPNRCAQQLAGKQSL 162
                                   110       120       130       140       150       160  


Chain C from PDB  Type:DNA  Length:22
                                                      
                 2bjc C   1 GAATTGTAAGCGCTTACAATTC  22
                                    10        20  


Chain D from PDB  Type:DNA  Length:22
                                                      
                 2bjc D 101 GAATTGTAAGCGCTTACAATTC 122
                                   110       120
   Legend:   → Mismatch (orange background)
  - → Gap (green background, '-', border residues have a numbering label)
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  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  (1, 2)

NMR Structure
(-)
Class: All alpha proteins (14657)

(-) CATH Domains  (1, 2)

NMR Structure
(-)
Class: Mainly Alpha (13335)

(-) Pfam Domains  (0, 0)

(no "Pfam Domain" information available for 2BJC)

(-) Gene Ontology  (8, 8)

NMR Structure(hide GO term definitions)
Chain A,B   (LACI_ECOLI | P03023)
molecular function
    GO:0003677    DNA binding    Any molecular function by which a gene product interacts selectively and non-covalently with DNA (deoxyribonucleic acid).
    GO:0000986    bacterial-type RNA polymerase core promoter proximal region sequence-specific DNA binding    Interacting selectively and non-covalently with a sequence of DNA that is in cis with and relatively close to a core promoter for a bacterial-type RNA polymerase.
    GO:0003700    transcription factor activity, sequence-specific DNA binding    Interacting selectively and non-covalently with a specific DNA sequence in order to modulate transcription. The transcription factor may or may not also interact selectively with a protein or macromolecular complex.
    GO:0001141    transcriptional repressor activity, bacterial-type RNA polymerase core promoter proximal region sequence-specific binding    Interacting selectively and non-covalently with a sequence of DNA that is in cis with and relatively close to a core promoter for a bacterial-type RNA polymerase in order to stop, prevent, or reduce the frequency, rate or extent of transcription from a bacterial-type RNA polymerase promoter.
biological process
    GO:0045892    negative regulation of transcription, DNA-templated    Any process that stops, prevents, or reduces the frequency, rate or extent of cellular DNA-templated transcription.
    GO:0006355    regulation of transcription, DNA-templated    Any process that modulates the frequency, rate or extent of cellular DNA-templated transcription.
    GO:0006351    transcription, DNA-templated    The cellular synthesis of RNA on a template of DNA.
cellular component
    GO:0005829    cytosol    The part of the cytoplasm that does not contain organelles but which does contain other particulate matter, such as protein complexes.

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  2bjc
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  LACI_ECOLI | P03023
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 Related Entries

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

UniProtKB/Swiss-Prot
        LACI_ECOLI | P03023: 1cjg 1efa 1jwl 1jye 1jyf 1l1m 1lbg 1lbh 1lbi 1lcc 1lcd 1lqc 1ltp 1osl 1tlf 1z04 2kei 2kej 2kek 2p9h 2paf 2pe5 3edc 4rzs 4rzt

(-) Related Entries Specified in the PDB File

1cjg NMR STRUCTURE OF LAC REPRESSOR HP62- DEOXYRIBONUCLEIC ACID COMPLEX
1efa CRYSTAL STRUCTURE OF THE LAC REPRESSOR DIMER BOUND TO OPERATOR AND THE ANTI-INDUCER ONPF
1jwl STRUCTURE OF THE DIMERIC LAC REPRESSOR/ OPERATOR O1/ONPFCOMPLEX
1jye STRUCTURE OF A DIMERIC LAC REPRESSOR WITH C-TERMINALDELETION AND K84L SUBSTITUTION
1jyf STRUCTURE OF THE DIMERIC LAC REPRESSOR WITH AN 11-RESIDUE C-TERMINAL DELETION.
1l1m SOLUTION STRUCTURE OF A DIMER OF LAC REPRESSOR DNA-BINDINGDOMAIN COMPLEXED TO ITS NATURAL OPERATOR O1
1lbg LACTOSE OPERON REPRESSOR BOUND TO 21-BASE PAIR SYMMETRIC OPERATOR DEOXYRIBONUCLEIC ACID, ALPHA CARBONS ONLY
1lbh INTACT LACTOSE OPERON REPRESSOR WITH GRATUITOUS INDUCER IPTG
1lbi LAC REPRESSOR
1lcc LAC REPRESSOR ("HEADPIECE") COMPLEX WITH AN 11 BASE-PAIR HALF-OPERATOR CORRESPONDING TO THE LEFT HALF OF THE WILD TYPE LAC OPERATOR (NMR, BEST STRUCTURE)
1lcd LAC REPRESSOR ("HEADPIECE") COMPLEX WITH AN 11 BASE-PAIR HALF-OPERATOR CORRESPONDING TO THE LEFT HALF OF THE WILD TYPE LAC OPERATOR (NMR, 3 STRUCTURES)
1lqc LAC REPRESSOR HEADPIECE (RESIDUES 1-56), NMR, 32 STRUCTURES
1ltp
1osl SOLUTION STRUCTURE OF A DIMERIC LACTOSE DNA -BINDING DOMAINCOMPLEXED TO A NONSPECIFIC DNA SEQUENCE
1tlf TRYPTIC CORE FRAGMENT OF THE LACTOSE REPRESSOR OF ESCHERICHIA COLI