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(-) Description

Title :  CRYSTAL STRUCTURE ANALYSIS OF SELENOMETHIONINE SUBSTITUTED CHALCONE O-METHYLTRANSFERASE
 
Authors :  C. Zubieta, R. A. Dixon, J. P. Noel
Date :  31 Aug 00  (Deposition) - 07 Mar 01  (Release) - 13 Jul 11  (Revision)
Method :  X-RAY DIFFRACTION
Resolution :  2.00
Chains :  Asym. Unit :  A
Biol. Unit 1:  A  (2x)
Keywords :  Selenomethionine Substituted Protein, Transferase (Keyword Search: [Gene Ontology, PubMed, Web (Google)] )
 
Reference :  C. Zubieta, X. Z. He, R. A. Dixon, J. P. Noel
Structures Of Two Natural Product Methyltransferases Reveal The Basis For Substrate Specificity In Plant O-Methyltransferases.
Nat. Struct. Biol. V. 8 271 2001
PubMed-ID: 11224575  |  Reference-DOI: 10.1038/85029

(-) Compounds

Molecule 1 - ISOLIQUIRITIGENIN 2'-O-METHYLTRANSFERASE
    Chains: A
    Engineered: YES
    Expression System: ESCHERICHIA COLI
    Expression System Taxid: 562
    Expression System Vector: PHIS8
    Expression System Vector Type: PLASMID
    Organism Scientific: MEDICAGO SATIVA
    Organism Taxid: 3879
    Synonym: CHALCONE O-METHYLTRANSFERASE

 Structural Features

(-) Chains, Units

  1
Asymmetric Unit : A
Biological Unit 1 (2x): A

Summary Information (see also Sequences/Alignments below)

(-) Ligands, Modified Residues, Ions  (2, 14)

Asymmetric Unit (2, 14)
No.NameCountTypeFull Name
1MSE13Mod. Amino AcidSELENOMETHIONINE
2SAM1Ligand/IonS-ADENOSYLMETHIONINE
Biological Unit 1 (2, 28)
No.NameCountTypeFull Name
1MSE26Mod. Amino AcidSELENOMETHIONINE
2SAM2Ligand/IonS-ADENOSYLMETHIONINE

(-) Sites  (1, 1)

Asymmetric Unit (1, 1)
No.NameEvidenceResiduesDescription
1AC1SOFTWAREGLU A:106 , GLY A:217 , ASN A:223 , ASP A:240 , LEU A:241 , VAL A:244 , ASP A:260 , MSE A:261 , PHE A:262 , LYS A:274 , ALA A:275 , ASN A:279 , HOH A:1739 , HOH A:1753 , HOH A:1754 , HOH A:1767 , HOH A:1780 , HOH A:1825BINDING SITE FOR RESIDUE SAM A 1699

(-) SS Bonds  (0, 0)

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

(-) Cis Peptide Bonds  (0, 0)

(no "Cis Peptide Bond" information available for 1FPQ)

 Sequence-Structure Mapping

(-) SAPs(SNPs)/Variants  (0, 0)

(no "SAP(SNP)/Variant" information available for 1FPQ)

(-) PROSITE Motifs  (1, 1)

Asymmetric Unit (1, 1)
 PROSITEUniProtKBPDB
No.IDACDescriptionIDLocationCountLocation
1SAM_OMT_IIPS51683 SAM-dependent O-methyltransferase class II-type profile.CHOMT_MEDSA29-372  1A:29-372
Biological Unit 1 (1, 2)
 PROSITEUniProtKBPDB
No.IDACDescriptionIDLocationCountLocation
1SAM_OMT_IIPS51683 SAM-dependent O-methyltransferase class II-type profile.CHOMT_MEDSA29-372  2A:29-372

(-) Exons   (0, 0)

(no "Exon" information available for 1FPQ)

(-) 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:333
 aligned with CHOMT_MEDSA | P93324 from UniProtKB/Swiss-Prot  Length:372

    Alignment length:353
                                    29        39        49        59        69        79        89        99       109       119       129       139       149       159       169       179       189       199       209       219       229       239       249       259       269       279       289       299       309       319       329       339       349       359       369   
          CHOMT_MEDSA    20 TEDSACLSAMVLTTNLVYPAVLNAAIDLNLFEIIAKATPPGAFMSPSEIASKLPASTQHSDLPNRLDRMLRLLASYSVLTSTTRTIEDGGAERVYGLSMVGKYLVPDESRGYLASFTTFLCYPALLQVWMNFKEAVVDEDIDLFKNVHGVTKYEFMGKDKKMNQIFNKSMVDVCATEMKRMLEIYTGFEGISTLVDVGGGSGRNLELIISKYPLIKGINFDLPQVIENAPPLSGIEHVGGDMFASVPQGDAMILKAVCHNWSDEKCIEFLSNCHKALSPNGKVIIVEFILPEEPNTSEESKLVSTLDNLMFITVGGRERTEKQYEKLSKLSGFSKFQVACRAFNSLGVMEFYK 372
               SCOP domains d1fpqa1 A:20-128 Chalcone O-methyltransferase                                                                d1fpqa2 A:129-372 Chalcone O-me                    thyltransferase                                                                                                                                                                                   SCOP domains
               CATH domains ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- CATH domains
               Pfam domains ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author hhhhhhhhhhhhhh.hhhhhhhhhhhhhhhhhhhhh........hhhhhhhhhhhhhh..hhhhhhhhhhhhhhhh..eeeeeee.....eeeeeee..hhhhhh.......hhhhhhhhhhhhhhhhhhhhhhhhhh..--------------------hhhhhhhhhhhhhhhhhhhhhhhhh.......eeeee....hhhhhhhhh.....eeeeeehhhhhh.......eeeee.........eeeeeee.hhhhhhhhhhhhhhhhhhhheeeeeeeeeeeeee......hhhhhhhhhhhhhhhhhh....eehhhhhhhhhhh...eeeeeeee...eeeeeee. Sec.struct. author
                 SAPs(SNPs) ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE ---------SAM_OMT_II  PDB: A:29-372 UniProt: 29-372                                                                                                                                                                                                                                                                                                                PROSITE
                 Transcript ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 1fpq A  20 TEDSACLSAmVLTTNLVYPAVLNAAIDLNLFEIIAKATPPGAFmSPSEIASKLPASTQHSDLPNRLDRmLRLLASYSVLTSTTRTIEDGGAERVYGLSmVGKYLVPDESRGYLASFTTFLCYPALLQVWmNFKEAVVDED--------------------KmNQIFNKSmVDVCATEmKRmLEIYTGFEGISTLVDVGGGSGRNLELIISKYPLIKGINFDLPQVIENAPPLSGIEHVGGDmFASVPQGDAmILKAVCHNWSDEKCIEFLSNCHKALSPNGKVIIVEFILPEEPNTSEESKLVSTLDNLmFITVGGRERTEKQYEKLSKLSGFSKFQVACRAFNSLGVmEFYK 372
                                    29        39        49        59   |    69        79        89        99       109       119       129       139       149       159         -         -||     189       199|      209       219       229       239       249       259 |     269 |     279       289       299       309       319       329       339       349       359       369   
                                    29-MSE                            63-MSE                   88-MSE                       118-MSE                        149-MSE   159                  180|     189-MSE 197-MSE                                                         261-MSE   271-MSE                                                   329-MSE                                368-MSE
                                                                                                                                                                                           181-MSE            200-MSE
   Legend:   → Mismatch (orange background)
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  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 Unit
(-)
Class: All alpha proteins (14657)
(-)
Class: Alpha and beta proteins (a/b) (23833)

(-) CATH Domains  (0, 0)

(no "CATH Domain" information available for 1FPQ)

(-) Pfam Domains  (0, 0)

(no "Pfam Domain" information available for 1FPQ)

(-) Gene Ontology  (7, 7)

Asymmetric Unit(hide GO term definitions)
Chain A   (CHOMT_MEDSA | P93324)
molecular function
    GO:0008171    O-methyltransferase activity    Catalysis of the transfer of a methyl group to the oxygen atom of an acceptor molecule.
    GO:0033802    isoliquiritigenin 2'-O-methyltransferase activity    Catalysis of the reaction: S-adenosyl-L-methionine + isoliquiritigenin = 2'-O-methylisoliquiritigenin + S-adenosyl-L-homocysteine + H(+).
    GO:0030751    licodione 2'-O-methyltransferase activity    Catalysis of the reaction: S-adenosyl-L-methionine(1+) + licodione = 2'-O-methyllicodione + S-adenosyl-L-homocysteine + H(+).
    GO:0008168    methyltransferase activity    Catalysis of the transfer of a methyl group to an acceptor molecule.
    GO:0046983    protein dimerization activity    The formation of a protein dimer, a macromolecular structure consists of two noncovalently associated identical or nonidentical subunits.
    GO:0016740    transferase activity    Catalysis of the transfer of a group, e.g. a methyl group, glycosyl group, acyl group, phosphorus-containing, or other groups, from one compound (generally regarded as the donor) to another compound (generally regarded as the acceptor). Transferase is the systematic name for any enzyme of EC class 2.
biological process
    GO:0032259    methylation    The process in which a methyl group is covalently attached to a molecule.

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 Related Entries

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

UniProtKB/Swiss-Prot
        CHOMT_MEDSA | P93324: 1fp1

(-) Related Entries Specified in the PDB File

1fp1 CRYSTAL STRUCTURE ANALYSIS OF CHALCONE O-METHYLTRANSFERASE
1fp2 CRYSTAL STRUCTURE ANALYSIS OF ISOFLAVONE O-METHYLTRANSFERASE
1fpx CRYSTAL STRUCTURE ANALYSIS OF SELENOMETHIONINE SUBSTITUTED ISOFLAVONE O-METHYLTRANSFERASE