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(-) Description

Title :  THE 1.6 A CRYSTAL STRUCTURE OF MSHC: THE RATE LIMITING ENZYME IN THE MYCOTHIOL BIOSYNTHETIC PATHWAY
 
Authors :  L. W. Tremblay, F. Fan, M. W. Vetting, J. S. Blanchard
Date :  14 Feb 08  (Deposition) - 30 Dec 08  (Release) - 30 Dec 08  (Revision)
Method :  X-RAY DIFFRACTION
Resolution :  1.60
Chains :  Asym. Unit :  A,B
Biol. Unit 1:  A  (1x)
Biol. Unit 2:  B  (1x)
Keywords :  Cysteine Ligase, Rossmann Fold, Cys-Sa Inhibitor, Zinc Binding, Atp-Binding, Aminoacyl-Trna Synthetase, Nucleotide- Binding, Protein Biosynthesis (Keyword Search: [Gene Ontology, PubMed, Web (Google))
 
Reference :  L. W. Tremblay, F. Fan, M. W. Vetting, J. S. Blanchard
The 1. 6 A Crystal Structure Of Mycobacterium Smegmatis Mshc: The Penultimate Enzyme In The Mycothiol Biosynthetic Pathway.
Biochemistry V. 47 13326 2008
PubMed-ID: 19053270  |  Reference-DOI: 10.1021/BI801708F
(for further references see the PDB file header)

(-) Compounds

Molecule 1 - CYSTEINYL-TRNA SYNTHETASE
    ChainsA, B
    EC Number6.1.1.16
    EngineeredYES
    Expression SystemESCHERICHIA COLI
    Expression System PlasmidPET28A
    Expression System StrainROSETTA2BL21(DE3)
    Expression System Vector TypePLASMID
    GeneCYSS
    Organism ScientificMYCOBACTERIUM SMEGMATIS

 Structural Features

(-) Chains, Units

  12
Asymmetric Unit AB
Biological Unit 1 (1x)A 
Biological Unit 2 (1x) B

Summary Information (see also Sequences/Alignments below)

(-) Ligands, Modified Residues, Ions  (5, 12)

Asymmetric Unit (5, 12)
No.NameCountTypeFull Name
11PE1Ligand/IonPENTAETHYLENE GLYCOL
25CA2Ligand/Ion5'-O-(N-(L-CYSTEINYL)-SULFAMOYL)ADENOSINE
3EPE1Ligand/Ion4-(2-HYDROXYETHYL)-1-PIPERAZINE ETHANESULFONIC ACID
4SO46Ligand/IonSULFATE ION
5ZN2Ligand/IonZINC ION
Biological Unit 1 (3, 6)
No.NameCountTypeFull Name
11PE1Ligand/IonPENTAETHYLENE GLYCOL
25CA1Ligand/Ion5'-O-(N-(L-CYSTEINYL)-SULFAMOYL)ADENOSINE
3EPE-1Ligand/Ion4-(2-HYDROXYETHYL)-1-PIPERAZINE ETHANESULFONIC ACID
4SO44Ligand/IonSULFATE ION
5ZN-1Ligand/IonZINC ION
Biological Unit 2 (3, 4)
No.NameCountTypeFull Name
11PE-1Ligand/IonPENTAETHYLENE GLYCOL
25CA1Ligand/Ion5'-O-(N-(L-CYSTEINYL)-SULFAMOYL)ADENOSINE
3EPE1Ligand/Ion4-(2-HYDROXYETHYL)-1-PIPERAZINE ETHANESULFONIC ACID
4SO42Ligand/IonSULFATE ION
5ZN-1Ligand/IonZINC ION

(-) Sites  (12, 12)

Asymmetric Unit (12, 12)
No.NameEvidenceResiduesDescription
01AC1SOFTWARECYS A:43 , CYS A:231 , HIS A:256BINDING SITE FOR RESIDUE ZN A 413
02AC2SOFTWARECYS B:43 , CYS B:231 , HIS B:256BINDING SITE FOR RESIDUE ZN B 413
03AC3SOFTWAREHOH A:589 , ARG B:15 , ALA B:18 , LEU B:19 , PRO B:34 , HIS B:74 , HOH B:444 , HOH B:504 , HOH B:525 , HOH B:618BINDING SITE FOR RESIDUE SO4 B 414
04AC4SOFTWAREARG A:207 , ARG A:210BINDING SITE FOR RESIDUE SO4 A 414
05AC5SOFTWAREPRO A:7 , ALA A:8 , ARG A:119 , HOH A:511 , HOH A:569BINDING SITE FOR RESIDUE SO4 A 415
06AC6SOFTWAREPRO B:7 , ALA B:8 , ARG B:119BINDING SITE FOR RESIDUE SO4 B 415
07AC7SOFTWARESER A:215 , PRO A:217 , ARG A:222 , HOH A:506 , HIS B:-1BINDING SITE FOR RESIDUE SO4 A 416
08AC8SOFTWAREPRO A:353 , ASP A:354 , GLY A:391 , HIS A:392 , ASP A:393BINDING SITE FOR RESIDUE SO4 A 417
09AC9SOFTWARECYS B:43 , GLY B:44 , ILE B:45 , THR B:46 , HIS B:52 , GLY B:54 , HIS B:55 , THR B:58 , TYR B:59 , ASN B:81 , THR B:83 , TRP B:227 , CYS B:231 , GLY B:248 , GLY B:249 , ASP B:251 , LEU B:252 , HIS B:256 , GLY B:281 , MET B:282 , ILE B:283 , HOH B:459 , HOH B:494 , HOH B:502 , HOH B:512 , HOH B:810 , HOH B:827BINDING SITE FOR RESIDUE 5CA B 416
10BC1SOFTWARECYS A:43 , GLY A:44 , ILE A:45 , THR A:46 , GLY A:54 , HIS A:55 , THR A:58 , TYR A:59 , ASN A:81 , THR A:83 , TRP A:227 , CYS A:231 , GLY A:248 , GLY A:249 , ASP A:251 , LEU A:252 , GLY A:281 , MET A:282 , ILE A:283 , HOH A:433 , HOH A:479 , HOH A:579BINDING SITE FOR RESIDUE 5CA A 418
11BC2SOFTWARETYR A:157 , GLU A:209 , HOH A:436 , HOH A:477 , PRO B:122 , HIS B:124BINDING SITE FOR RESIDUE 1PE A 419
12BC3SOFTWAREHOH A:465 , MET B:1 , ASP B:84 , ARG B:101 , ASP B:105 , THR B:108 , ALA B:128 , THR B:130 , TRP B:216BINDING SITE FOR RESIDUE EPE B 417

(-) SS Bonds  (0, 0)

(no "SS Bond" information available for 3C8Z)

(-) Cis Peptide Bonds  (3, 3)

Asymmetric Unit
No.Residues
1Phe A:254 -Pro A:255
2Ala B:50 -Thr B:51
3Phe B:254 -Pro B:255

 Sequence-Structure Mapping

(-) SAPs(SNPs)/Variants  (0, 0)

(no "SAP(SNP)/Variant" information available for 3C8Z)

(-) PROSITE Motifs  (0, 0)

(no "PROSITE Motif" information available for 3C8Z)

(-) Exons   (0, 0)

(no "Exon" information available for 3C8Z)

(-) Sequences/Alignments

Asymmetric 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:399
 aligned with MSHC_MYCS2 | A0QZY0 from UniProtKB/Swiss-Prot  Length:412

    Alignment length:412
                                    10        20        30        40        50        60        70        80        90       100       110       120       130       140       150       160       170       180       190       200       210       220       230       240       250       260       270       280       290       300       310       320       330       340       350       360       370       380       390       400       410  
           MSHC_MYCS2     1 MQSWSAPAIPVVPGRGPALRLFDSADRQVRPVTPGPTATMYVCGITPYDATHLGHAATYLTFDLVHRLWLDAGHTVQYVQNVTDVDDPLFERAERDGIDWRTLGDRETQLFREDMAALRVLPPHDYVAATDAIAEVVEMVEKLLASGAAYIVEDAEYPDVYFRADATAQFGYESGYDRDTMLTLFAERGGDPDRPGKSDQLDALLWRAERPGEPSWPSPFGRGRPGWHVECSAIALTRIGTGLDIQGGGSDLIFPHHEYSAAHAESVTGERRFARHYVHTGMIGWDGHKMSKSRGNLVLVSQLRAQGVDPSAIRLGLFSGHYREDRFWSNEVLDEANARLARWRSATALPEAPDATDVIARVRQYLADDLDTPKALAALDGWCTDALSYGGHDTESPRLVATTVDALLGVDL 412
               SCOP domains ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SCOP domains
               CATH domains ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- CATH domains
               Pfam domains ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author ...................eeee....eeee.....eeeeee.........hhhhhhhhhhhhhhhhhhhhh..eeeeeeee...hhhhhhhhhhhh.hhhhhhhhhhhhhhhhhhhh......eeee...hhhhhhhhhhhhhhh..eee........eee..............hhhhhhhhhhhh..............eeeeee..............eeehhhhhhhhhhhhhh...eeeeeee.hhh.hhhhhhhhhhhhhhh....eeeeeee..ee-------------.hhhhhhhh..hhhhhhhhhhh......ee.hhhhhhhhhhhhhhhhhhhh......hhhhhhhhhhhhhh..hhhhhhhhhhhhhhhhhhhh....hhhhhhhhhhhhhhh... Sec.struct. author
                 SAPs(SNPs) ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- PROSITE
                 Transcript ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 3c8z A   1 MQSWSAPAIPVVPGRGPALRLFDSADRQVRPVTPGPTATMYVCGITPYDATHLGHAATYLTFDLVHRLWLDAGHTVQYVQNVTDVDDPLFERAERDGIDWRTLGDRETQLFREDMAALRVLPPHDYVAATDAIAEVVEMVEKLLASGAAYIVEDAEYPDVYFRADATAQFGYESGYDRDTMLTLFAERGGDPDRPGKSDQLDALLWRAERPGEPSWPSPFGRGRPGWHVECSAIALTRIGTGLDIQGGGSDLIFPHHEYSAAHAESVTGERRFARHYVHTGMIG-------------VLVSQLRAQGVDPSAIRLGLFSGHYREDRFWSNEVLDEANARLARWRSATALPEAPDATDVIARVRQYLADDLDTPKALAALDGWCTDALSYGGHDTESPRLVATTVDALLGVDL 412
                                    10        20        30        40        50        60        70        80        90       100       110       120       130       140       150       160       170       180       190       200       210       220       230       240       250       260       270       280   |     -       300       310       320       330       340       350       360       370       380       390       400       410  
                                                                                                                                                                                                                                                                                                                     284           298                                                                                                                  

Chain B from PDB  Type:PROTEIN  Length:401
 aligned with MSHC_MYCS2 | A0QZY0 from UniProtKB/Swiss-Prot  Length:412

    Alignment length:414
                              1                                                                                                                                                                                                                                                                                                                                                                                                                           
                              |      8        18        28        38        48        58        68        78        88        98       108       118       128       138       148       158       168       178       188       198       208       218       228       238       248       258       268       278       288       298       308       318       328       338       348       358       368       378       388       398       408    
           MSHC_MYCS2     - --MQSWSAPAIPVVPGRGPALRLFDSADRQVRPVTPGPTATMYVCGITPYDATHLGHAATYLTFDLVHRLWLDAGHTVQYVQNVTDVDDPLFERAERDGIDWRTLGDRETQLFREDMAALRVLPPHDYVAATDAIAEVVEMVEKLLASGAAYIVEDAEYPDVYFRADATAQFGYESGYDRDTMLTLFAERGGDPDRPGKSDQLDALLWRAERPGEPSWPSPFGRGRPGWHVECSAIALTRIGTGLDIQGGGSDLIFPHHEYSAAHAESVTGERRFARHYVHTGMIGWDGHKMSKSRGNLVLVSQLRAQGVDPSAIRLGLFSGHYREDRFWSNEVLDEANARLARWRSATALPEAPDATDVIARVRQYLADDLDTPKALAALDGWCTDALSYGGHDTESPRLVATTVDALLGVDL 412
               SCOP domains ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ SCOP domains
               CATH domains ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ CATH domains
               Pfam domains ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ Pfam domains
         Sec.struct. author .....................eeee....eeee......eeeee.........hhhhhhhhhhhhhhhhhhhhh...eeeeeee...hhhhhhhhhhhh.hhhhhhhhhhhhhhhhhhhh......eeee...hhhhhhhhhhhhhhh..eee........eee..............hhhhhhhhhhhh..............eeeeee..............eeehhhhhhhhhhhhhh.....eeeee.hhh.hhhhhhhhhhhhhhh......eeeee..ee-------------.hhhhhhhh..hhhhhhhhhhh......ee.hhhhhhhhhhhhhhhhhhhh......hhhhhhhhhhhhhh..hhhhhhhhhhhhhhhhhhhh....hhhhhhhhhhhhhhh... Sec.struct. author
                 SAPs(SNPs) ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ SAPs(SNPs)
                    PROSITE ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ PROSITE
                 Transcript ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ Transcript
                 3c8z B  -1 HMMQSWSAPAIPVVPGRGPALRLFDSADRQVRPVTPGPTATMYVCGITPYDATHLGHAATYLTFDLVHRLWLDAGHTVQYVQNVTDVDDPLFERAERDGIDWRTLGDRETQLFREDMAALRVLPPHDYVAATDAIAEVVEMVEKLLASGAAYIVEDAEYPDVYFRADATAQFGYESGYDRDTMLTLFAERGGDPDRPGKSDQLDALLWRAERPGEPSWPSPFGRGRPGWHVECSAIALTRIGTGLDIQGGGSDLIFPHHEYSAAHAESVTGERRFARHYVHTGMIG-------------VLVSQLRAQGVDPSAIRLGLFSGHYREDRFWSNEVLDEANARLARWRSATALPEAPDATDVIARVRQYLADDLDTPKALAALDGWCTDALSYGGHDTESPRLVATTVDALLGVDL 412
                                     8        18        28        38        48        58        68        78        88        98       108       118       128       138       148       158       168       178       188       198       208       218       228       238       248       258       268       278     |   -       298       308       318       328       338       348       358       368       378       388       398       408    
                                                                                                                                                                                                                                                                                                                       284           298                                                                                                                  

   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  (0, 0)

(no "SCOP Domain" information available for 3C8Z)

(-) CATH Domains  (0, 0)

(no "CATH Domain" information available for 3C8Z)

(-) Pfam Domains  (0, 0)

(no "Pfam Domain" information available for 3C8Z)

(-) Gene Ontology  (7, 7)

Asymmetric Unit(hide GO term definitions)
Chain A,B   (MSHC_MYCS2 | A0QZY0)
molecular function
    GO:0005524    ATP binding    Interacting selectively and non-covalently with ATP, adenosine 5'-triphosphate, a universally important coenzyme and enzyme regulator.
    GO:0035446    cysteine-glucosaminylinositol ligase activity    Catalysis of the reaction: 1-(2-amino-2-deoxy-alpha-D-glucopyranoside)-1D-myo-inositol + L-cysteine + ATP = 1-D-myo-inosityl-2-L-cysteinylamido-2-deoxy-alpha-D-glucopyranoside + AMP + diphosphate + 2 H+. 1-(2-amino-2-deoxy-alpha-D-glucopyranoside)-1D-myo-inositol is also known as glucosaminyl-inositol or GlcN-Ins, and 1-D-myo-inosityl-2-L-cysteinylamido-2-deoxy-alpha-D-glucopyranoside as desacetylmycothiol or Cys-GlcN-Ins.
    GO:0016874    ligase activity    Catalysis of the joining of two substances, or two groups within a single molecule, with the concomitant hydrolysis of the diphosphate bond in ATP or a similar triphosphate.
    GO:0046872    metal ion binding    Interacting selectively and non-covalently with any metal ion.
    GO:0000166    nucleotide binding    Interacting selectively and non-covalently with a nucleotide, any compound consisting of a nucleoside that is esterified with (ortho)phosphate or an oligophosphate at any hydroxyl group on the ribose or deoxyribose.
    GO:0008270    zinc ion binding    Interacting selectively and non-covalently with zinc (Zn) ions.
biological process
    GO:0010125    mycothiol biosynthetic process    The chemical reactions and pathways resulting in the formation of mycothiol, which consists of N-acetyl-L-cysteine linked to a pseudodisaccharide, D-glucosamine and myo-inositol. Mycothiol is produced in actinomycetes like mycobacteria and serves similar functions to glutathione.

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 Related Entries

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(-) Related Entries Specified in the PDB File

1li5 CYSTEINYL-TRNA SYNTHASE
1u0b CYSTEINYL-TRNA SYNTHASE