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(-) Description

Title :  CRYSTAL STRUCTURE ANALYSIS OF CHALCONE O-METHYLTRANSFERASE
 
Authors :  C. Zubieta, R. A. Dixon, J. P. Noel
Date :  29 Aug 00  (Deposition) - 07 Mar 01  (Release) - 13 Jul 11  (Revision)
Method :  X-RAY DIFFRACTION
Resolution :  1.82
Chains :  Asym. Unit :  D
Biol. Unit 1:  D  (2x)
Keywords :  Protein-Substrate, Protein-Product Complex, 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: D
    Engineered: YES
    Expression System: ESCHERICHIA COLI
    Expression System Plasmid: PHIS8
    Expression System Taxid: 562
    Expression System Vector Type: PLASMID
    Organism Scientific: MEDICAGO SATIVA
    Organism Taxid: 3879
    Synonym: CHALCONE O-METHYLTRANSFERASE

 Structural Features

(-) Chains, Units

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

Summary Information (see also Sequences/Alignments below)

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

Asymmetric Unit (2, 2)
No.NameCountTypeFull Name
1HCC1Ligand/Ion2',4,4'-TRIHYDROXYCHALCONE
2SAH1Ligand/IonS-ADENOSYL-L-HOMOCYSTEINE
Biological Unit 1 (2, 4)
No.NameCountTypeFull Name
1HCC2Ligand/Ion2',4,4'-TRIHYDROXYCHALCONE
2SAH2Ligand/IonS-ADENOSYL-L-HOMOCYSTEINE

(-) Sites  (2, 2)

Asymmetric Unit (2, 2)
No.NameEvidenceResiduesDescription
1AC1SOFTWAREGLU D:106 , GLY D:217 , ASN D:223 , ASP D:240 , LEU D:241 , VAL D:244 , ASP D:260 , MET D:261 , PHE D:262 , LYS D:274 , ALA D:275 , HCC D:2000 , HOH D:2001 , HOH D:2006 , HOH D:2031 , HOH D:2035 , HOH D:2041 , HOH D:2057 , HOH D:2090BINDING SITE FOR RESIDUE SAH D 1699
2AC2SOFTWAREMET D:29 , PHE D:135 , PHE D:185 , MET D:189 , VAL D:192 , CYS D:193 , LYS D:274 , ALA D:275 , HIS D:278 , LEU D:328 , MET D:329 , THR D:332 , SAH D:1699 , HOH D:2011 , HOH D:2018 , HOH D:2139BINDING SITE FOR RESIDUE HCC D 2000

(-) SS Bonds  (0, 0)

(no "SS Bond" information available for 1FP1)

(-) Cis Peptide Bonds  (0, 0)

(no "Cis Peptide Bond" information available for 1FP1)

 Sequence-Structure Mapping

(-) SAPs(SNPs)/Variants  (0, 0)

(no "SAP(SNP)/Variant" information available for 1FP1)

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

(-) Exons   (0, 0)

(no "Exon" information available for 1FP1)

(-) 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 D from PDB  Type:PROTEIN  Length:340
 aligned with CHOMT_MEDSA | P93324 from UniProtKB/Swiss-Prot  Length:372

    Alignment length:354
                                    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    
          CHOMT_MEDSA    19 QTEDSACLSAMVLTTNLVYPAVLNAAIDLNLFEIIAKATPPGAFMSPSEIASKLPASTQHSDLPNRLDRMLRLLASYSVLTSTTRTIEDGGAERVYGLSMVGKYLVPDESRGYLASFTTFLCYPALLQVWMNFKEAVVDEDIDLFKNVHGVTKYEFMGKDKKMNQIFNKSMVDVCATEMKRMLEIYTGFEGISTLVDVGGGSGRNLELIISKYPLIKGINFDLPQVIENAPPLSGIEHVGGDMFASVPQGDAMILKAVCHNWSDEKCIEFLSNCHKALSPNGKVIIVEFILPEEPNTSEESKLVSTLDNLMFITVGGRERTEKQYEKLSKLSGFSKFQVACRAFNSLGVMEFYK 372
               SCOP domains d1fp1d1 D:19-128 Chalcone O-methyltransferase                                                                 d1fp1d2 D:129-372 Chalcone O-me              thyltransferase                                                                                                                                                                                         SCOP domains
               CATH domains 1fp1D01 D:19-123 'winged helix' repressor DNA binding domain                                             1fp1D02 D:124-372 Vaccinia Virus pro              tein VP39                                                                                                                                                                                               CATH domains
               Pfam domains ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ Pfam domains
         Sec.struct. author .hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh........hhhhhhhhhhhhhh..hhhhhhhhhhhhhhhh..eeeeeee.....eeeeeee..hhhhhh........hhhhhhhhhhhhhhhhhhhhhhhhh..--------------....hhhhhhhhhhhhhhhhhhhhhhhhhhh.......eeeee....hhhhhhhhhhh...eeeeeehhhhhh.......eeeee.........eeeeeee.hhhhhhhhhhhhhhhhhhhheeeeeeeeeeeeee......hhhhhhhhhhhhhhhhhhh...eehhhhhhhhhhh...eeeeeeee...eeeeeee. Sec.struct. author
                 SAPs(SNPs) ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ SAPs(SNPs)
                    PROSITE ----------SAM_OMT_II  PDB: D:29-372 UniProt: 29-372                                                                                                                                                                                                                                                                                                                PROSITE
                 Transcript ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ Transcript
                 1fp1 D  19 QTEDSACLSAMVLTTNLVYPAVLNAAIDLNLFEIIAKATPPGAFMSPSEIASKLPASTQHSDLPNRLDRMLRLLASYSVLTSTTRTIEDGGAERVYGLSMVGKYLVPDESRGYLASFTTFLCYPALLQVWMNFKEAVVDED--------------FMGKDKKMNQIFNKSMVDVCATEMKRMLEIYTGFEGISTLVDVGGGSGRNLELIISKYPLIKGINFDLPQVIENAPPLSGIEHVGGDMFASVPQGDAMILKAVCHNWSDEKCIEFLSNCHKALSPNGKVIIVEFILPEEPNTSEESKLVSTLDNLMFITVGGRERTEKQYEKLSKLSGFSKFQVACRAFNSLGVMEFYK 372
                                    28        38        48        58        68        78        88        98       108       118       128       138       148       158|        -     | 178       188       198       208       218       228       238       248       258       268       278       288       298       308       318       328       338       348       358       368    
                                                                                                                                                                      159            174
   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  (2, 2)

Asymmetric Unit
(-)
Class: Alpha Beta (26913)
(-)
Class: Mainly Alpha (13335)

(-) Pfam Domains  (0, 0)

(no "Pfam Domain" information available for 1FP1)

(-) Gene Ontology  (7, 7)

Asymmetric Unit(hide GO term definitions)
Chain D   (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: 1fpq

(-) Related Entries Specified in the PDB File

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