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(-) Description

Title :  STRUCTURE OF THE E. COLI PROTEIN MQSA (YGIT/B3021)
 
Authors :  B. L. Brown, J. M. Arruda, W. Peti, R. Page
Date :  16 Mar 09  (Deposition) - 12 Jan 10  (Release) - 13 Jul 11  (Revision)
Method :  X-RAY DIFFRACTION
Resolution :  2.15
Chains :  Asym./Biol. Unit :  A,B
Keywords :  Zn-Binding Protein, Hth-Xre Dna Binding Motif, Dna-Binding, Transcription, Transcription Regulation, Dna Binding Protein (Keyword Search: [Gene Ontology, PubMed, Web (Google)] )
 
Reference :  B. L. Brown, S. Grigoriu, Y. Kim, J. M. Arruda, A. Davenport, T. K. Wood, W. Peti, R. Page
Three Dimensional Structure Of The Mqsr:Mqsa Complex: A Novel Ta Pair Comprised Of A Toxin Homologous To Rele And A Antitoxin With Unique Properties.
Plos Pathog. V. 5 E1000 2009
PubMed-ID: 20041169  |  Reference-DOI: 10.1371/JOURNAL.PPAT.1000706

(-) Compounds

Molecule 1 - HTH-TYPE TRANSCRIPTIONAL REGULATOR MQSA (YGIT/B3021)
    Chains: A
    Engineered: YES
    Expression System: ESCHERICHIA COLI
    Expression System Plasmid: RP1B
    Expression System Strain: BL21 DE3 RIL
    Expression System Taxid: 562
    Expression System Vector Type: PLASMID
    Gene: B3021, JW2989, YGIT
    Organism Scientific: ESCHERICHIA COLI K-12
    Organism Taxid: 83333
    Strain: ESCHERICHIA COLI STR. K12
 
Molecule 2 - HTH-TYPE TRANSCRIPTIONAL REGULATOR MQSA (YGIT/B3021)
    Chains: B
    Engineered: YES
    Expression System: ESCHERICHIA COLI
    Expression System Plasmid: RP1B
    Expression System Strain: BL21 DE3 RIL
    Expression System Taxid: 562
    Expression System Vector Type: PLASMID
    Gene: YGIT, B3021, JW2989
    Organism Scientific: ESCHERICHIA COLI K-12
    Organism Taxid: 83333
    Strain: ESCHERICHIA COLI STR. K12

 Structural Features

(-) Chains, Units

  12
Asymmetric/Biological Unit : AB

Summary Information (see also Sequences/Alignments below)

(-) Ligands, Modified Residues, Ions  (3, 4)

Asymmetric/Biological Unit (3, 4)
No.NameCountTypeFull Name
1GOL1Ligand/IonGLYCEROL
2MEQ1Mod. Amino AcidN5-METHYLGLUTAMINE
3ZN2Ligand/IonZINC ION

(-) Sites  (3, 3)

Asymmetric Unit (3, 3)
No.NameEvidenceResiduesDescription
1AC1SOFTWARECYS A:3 , CYS A:6 , CYS A:37 , CYS A:40BINDING SITE FOR RESIDUE ZN A 132
2AC2SOFTWAREARG A:23 , ASN A:65 , THR A:68 , HOH A:257BINDING SITE FOR RESIDUE GOL A 3968
3AC3SOFTWARECYS B:3 , CYS B:6 , CYS B:37 , CYS B:40BINDING SITE FOR RESIDUE ZN B 132

(-) SS Bonds  (0, 0)

(no "SS Bond" information available for 3GN5)

(-) Cis Peptide Bonds  (0, 0)

(no "Cis Peptide Bond" information available for 3GN5)

 Sequence-Structure Mapping

(-) SAPs(SNPs)/Variants  (0, 0)

(no "SAP(SNP)/Variant" information available for 3GN5)

(-) PROSITE Motifs  (1, 2)

Asymmetric/Biological Unit (1, 2)
 PROSITEUniProtKBPDB
No.IDACDescriptionIDLocationCountLocation
1HTH_CROC1PS50943 Cro/C1-type HTH domain profile.MQSA_ECOLI74-127
 		  2A:74-127
B:74-127

(-) Exons   (0, 0)

(no "Exon" information available for 3GN5)

(-) 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:132
 aligned with MQSA_ECOLI | Q46864 from UniProtKB/Swiss-Prot  Length:131

    Alignment length:132
                             1                                                                                                                                  
                             |       9        19        29        39        49        59        69        79        89        99       109       119       129  
           MQSA_ECOLI     - -MKCPVCHQGEMVSGIKDIPYTFRGRKTVLKGIHGLYCVHCEESIMNKEESDAFMAQVKAFRASVNAETVAPEFIVKVRKKLSLTQKEASEIFGGGVNAFSRYEKGNAQPHPSTIKLLRVLDKHPELLNEIR 131
               SCOP domains ------------------------------------------------------------------------------------------------------------------------------------ SCOP domains
               CATH domains ------------------------------------------------------------------------------------------------------------------------------------ CATH domains
               Pfam domains ------------------------------------------------------------------------------------------------------------------------------------ Pfam domains
         Sec.struct. author ...........eeeeeeeeeeee..eeeeeeeeeeeee.....ee.hhhhhhhhhhhhhhhhhhhhhh..hhhhhhhhhhhh..hhhhhhhhhh...hhhhhhhh.....hhhhhhhhhhhhhh..hhhhhh Sec.struct. author
                 SAPs(SNPs) ------------------------------------------------------------------------------------------------------------------------------------ SAPs(SNPs)
                    PROSITE --------------------------------------------------------------------------HTH_CROC1  PDB: A:74-127 UniProt: 74-127              ---- PROSITE
                 Transcript ------------------------------------------------------------------------------------------------------------------------------------ Transcript
                 3gn5 A   0 HMKCPVCHQGEMVSGIKDIPYTFRGRKTVLKGIHGLYCVHCEESIMNKEESDAFMAQVKAFRASVNAETVAPEFIVKVRKKLSLTQKEASEIFGGGVNAFSRYEKGNAQPHPSTIKLLRVLDKHPELLNEIR 131
                                     9        19        29        39        49        59        69        79        89        99       109       119       129  


Chain B from PDB  Type:PROTEIN  Length:131
 aligned with MQSA_ECOLI | Q46864 from UniProtKB/Swiss-Prot  Length:131

    Alignment length:131
                                    10        20        30        40        50        60        70        80        90       100       110       120       130 
           MQSA_ECOLI     1 MKCPVCHQGEMVSGIKDIPYTFRGRKTVLKGIHGLYCVHCEESIMNKEESDAFMAQVKAFRASVNAETVAPEFIVKVRKKLSLTQKEASEIFGGGVNAFSRYEKGNAQPHPSTIKLLRVLDKHPELLNEIR 131
               SCOP domains ----------------------------------------------------------------------------------------------------------------------------------- SCOP domains
               CATH domains ----------------------------------------------------------------------------------------------------------------------------------- CATH domains
               Pfam domains ----------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author ..........eeeeeeeeeeee..eeeeeeeeeeeee.....ee.hhhhhhhhhhhhhhhhhhhhhh..hhhhhhhhhhhh..hhhhhhhhhh...hhhhhhhh.....hhhhhhhhhhhhhh..hhhhhh Sec.struct. author
                 SAPs(SNPs) ----------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE -------------------------------------------------------------------------HTH_CROC1  PDB: B:74-127 UniProt: 74-127              ---- PROSITE
                 Transcript ----------------------------------------------------------------------------------------------------------------------------------- Transcript
                 3gn5 B   1 MKCPVCHQGEMVSGIKDIPYTFRGRKTVLKGIHGLYCVHCEESIMNKEESDAFMAQVKAFRASVNAETVAPEFIVKVRKKLSLTQKEASEIFGGGVNAFSRYEKGNAqPHPSTIKLLRVLDKHPELLNEIR 131
                                    10        20        30        40        50        60        70        80        90       100       110       120       130 
                                                                                                                                     108-MEQ
   Legend:   → Mismatch (orange background)
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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  (0, 0)

(no "SCOP Domain" information available for 3GN5)

(-) CATH Domains  (0, 0)

(no "CATH Domain" information available for 3GN5)

(-) Pfam Domains  (0, 0)

(no "Pfam Domain" information available for 3GN5)

(-) Gene Ontology  (6, 6)

Asymmetric/Biological Unit(hide GO term definitions)
Chain A,B   (MQSA_ECOLI | Q46864)
molecular function
    GO:0003677    DNA binding    Any molecular function by which a gene product interacts selectively and non-covalently with DNA (deoxyribonucleic acid).
    GO:0046872    metal ion binding    Interacting selectively and non-covalently with any metal ion.
    GO:0005515    protein binding    Interacting selectively and non-covalently with any protein or protein complex (a complex of two or more proteins that may include other nonprotein molecules).
    GO:0043565    sequence-specific DNA binding    Interacting selectively and non-covalently with DNA of a specific nucleotide composition, e.g. GC-rich DNA binding, or with a specific sequence motif or type of DNA e.g. promotor binding or rDNA binding.
biological process
    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.

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  MQSA_ECOLI | Q46864
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 Related Entries

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

UniProtKB/Swiss-Prot
        MQSA_ECOLI | Q46864: 2kz8 3fmy 3ga8 3hi2 3o9x

(-) Related Entries Specified in the PDB File

3fmy STRUCTURE OF THE C-TERMINAL DOMAIN OF THE E. COLI PROTEIN MQSA (YGIT/B3021)
3ga8 STRUCTURE OF THE N-TERMINAL DOMAIN OF THE E. COLI PROTEIN MQSA (YGIT/B3021)
3hi2 STRUCTURE OF THE N-TERMINAL DOMAIN OF THE E. COLI ANTITOXIN MQSA (YGIT/B3021) IN COMPLEX WITH THE E. COLI TOXIN MQSR (YGIU/B3022)