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(-) Description

Title :  CRYSTAL STRUCTURE OF ASPERGILLUS FUMIGATUS CHITINASE B1 IN COMPLEX WITH PENTOXIFYLLINE
 
Authors :  F. V. Rao, O. A. Andersen, K. A. Vora, J. A. Demartino, D. M. F. Van Aalten
Date :  24 Jun 05  (Deposition) - 27 Sep 05  (Release) - 24 Feb 09  (Revision)
Method :  X-RAY DIFFRACTION
Resolution :  2.07
Chains :  Asym. Unit :  A,B
Biol. Unit 1:  A  (1x)
Biol. Unit 2:  B  (1x)
Keywords :  (Beta-Alpha)8 Barrel, Chitinase-Pentoxifylline Complex, Hydrolase (Keyword Search: [Gene Ontology, PubMed, Web (Google))
 
Reference :  F. V. Rao, O. A. Andersen, K. A. Vora, J. A. Demartino, D. M. Van Aalten
Methylxanthine Drugs Are Chitinase Inhibitors: Investigation Of Inhibition And Binding Modes.
Chem. Biol. V. 12 973 2005
PubMed-ID: 16183021  |  Reference-DOI: 10.1016/J.CHEMBIOL.2005.07.009
(for further references see the PDB file header)

(-) Compounds

Molecule 1 - CHITINASE
    ChainsA, B
    EC Number3.2.1.14
    EngineeredYES
    Expression SystemESCHERICHIA COLI BL21(DE3)
    Expression System PlasmidPLYSS
    Expression System StrainBL21(DE3)
    Expression System Taxid469008
    Expression System Vector TypePLASMID
    Organism ScientificASPERGILLUS FUMIGATUS
    Organism Taxid5085
    SynonymCHITINASE B1

 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  (2, 11)

Asymmetric Unit (2, 11)
No.NameCountTypeFull Name
1PNX4Ligand/Ion3,7-DIMETHYL-1-(5-OXOHEXYL)-3,7-DIHYDRO-1H-PURINE-2,6-DIONE
2SO47Ligand/IonSULFATE ION
Biological Unit 1 (2, 6)
No.NameCountTypeFull Name
1PNX2Ligand/Ion3,7-DIMETHYL-1-(5-OXOHEXYL)-3,7-DIHYDRO-1H-PURINE-2,6-DIONE
2SO44Ligand/IonSULFATE ION
Biological Unit 2 (2, 5)
No.NameCountTypeFull Name
1PNX2Ligand/Ion3,7-DIMETHYL-1-(5-OXOHEXYL)-3,7-DIHYDRO-1H-PURINE-2,6-DIONE
2SO43Ligand/IonSULFATE ION

(-) Sites  (11, 11)

Asymmetric Unit (11, 11)
No.NameEvidenceResiduesDescription
01AC1SOFTWAREARG A:126 , GLN A:414 , SER B:103BINDING SITE FOR RESIDUE SO4 A 1001
02AC2SOFTWARETHR A:149 , ASP A:150 , HOH A:1688 , HOH A:1820BINDING SITE FOR RESIDUE SO4 A 1002
03AC3SOFTWARETHR B:149 , ASP B:150 , HOH B:2598 , HOH B:2755BINDING SITE FOR RESIDUE SO4 B 1003
04AC4SOFTWAREASN A:181 , ASP A:182 , HOH A:1729 , HOH A:1763BINDING SITE FOR RESIDUE SO4 A 1004
05AC5SOFTWAREASN B:181 , ASP B:182BINDING SITE FOR RESIDUE SO4 B 1005
06AC6SOFTWAREHIS A:229 , LEU A:230 , LYS A:231 , ASP A:232 , HOH A:1630BINDING SITE FOR RESIDUE SO4 A 1006
07AC7SOFTWAREHIS B:229 , LEU B:230 , LYS B:231 , ASP B:232 , HOH B:2574 , HOH B:2665BINDING SITE FOR RESIDUE SO4 B 1007
08AC8SOFTWARETRP A:52 , PHE A:76 , GLY A:136 , TRP A:137 , THR A:138 , ASP A:175 , GLU A:177 , MET A:243 , TYR A:245 , ASP A:246 , TRP A:384 , HOH A:1818 , HOH A:1819BINDING SITE FOR RESIDUE PNX A 1434
09AC9SOFTWAREGLN A:364 , TRP B:52 , PHE B:76 , GLY B:136 , TRP B:137 , THR B:138 , ASP B:175 , MET B:243 , TYR B:245 , ASP B:246 , TYR B:299 , TRP B:384 , HOH B:2492 , HOH B:2594BINDING SITE FOR RESIDUE PNX B 2433
10BC1SOFTWARETRP A:137 , TYR A:178 , ASP A:246 , ALA A:248 , GLY A:249 , SER A:250 , PHE A:251 , ARG A:301BINDING SITE FOR RESIDUE PNX A 1435
11BC2SOFTWARETRP B:137 , TYR B:178 , ASP B:246 , ALA B:248 , GLY B:249 , PHE B:251 , SER B:252 , ARG B:301BINDING SITE FOR RESIDUE PNX B 2434

(-) SS Bonds  (0, 0)

(no "SS Bond" information available for 2A3C)

(-) Cis Peptide Bonds  (8, 8)

Asymmetric Unit
No.Residues
1Ala A:75 -Phe A:76
2Glu A:177 -Tyr A:178
3Leu A:331 -Pro A:332
4Trp A:384 -Asp A:385
5Ala B:75 -Phe B:76
6Glu B:177 -Tyr B:178
7Leu B:331 -Pro B:332
8Trp B:384 -Asp B:385

 Sequence-Structure Mapping

(-) SAPs(SNPs)/Variants  (0, 0)

(no "SAP(SNP)/Variant" information available for 2A3C)

(-) PROSITE Motifs  (1, 2)

Asymmetric Unit (1, 2)
 PROSITEUniProtKBPDB
No.IDACDescriptionIDLocationCountLocation
1CHITINASE_18PS01095 Chitinases family 18 active site.CHIB1_ASPFM169-177
 
  2A:169-177
B:169-177
Biological Unit 1 (1, 1)
 PROSITEUniProtKBPDB
No.IDACDescriptionIDLocationCountLocation
1CHITINASE_18PS01095 Chitinases family 18 active site.CHIB1_ASPFM169-177
 
  1A:169-177
-
Biological Unit 2 (1, 1)
 PROSITEUniProtKBPDB
No.IDACDescriptionIDLocationCountLocation
1CHITINASE_18PS01095 Chitinases family 18 active site.CHIB1_ASPFM169-177
 
  1-
B:169-177

(-) Exons   (0, 0)

(no "Exon" information available for 2A3C)

(-) 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:395
 aligned with CHIB1_ASPFM | Q873X9 from UniProtKB/Swiss-Prot  Length:433

    Alignment length:395
                                    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       418       428     
          CHIB1_ASPFM    39 ASSGYRSVVYFVNWAIYGRNHNPQDLPVERLTHVLYAFANVRPETGEVYMTDSWADIEKHYPGDSWSDTGNNVYGCIKQLYLLKKQNRNLKVLLSIGGWTYSPNFAPAASTDAGRKNFAKTAVKLLQDLGFDGLDIDWEYPENDQQANDFVLLLKEVRTALDSYSAANAGGQHFLLTVASPAGPDKIKVLHLKDMDQQLDFWNLMAYDYAGSFSSLSGHQANVYNDTSNPLSTPFNTQTALDLYRAGGVPANKIVLGMPLYGRSFANTDGPGKPYNGVGQGSWENGVWDYKALPQAGATEHVLPDIMASYSYDATNKFLISYDNPQVANLKSGYIKSLGLGGAMWWDSSSDKTGSDSLITTVVNALGGTGVFEQSQNELDYPVSQYDNLRNGMQT 433
               SCOP domains d2a3ca1 A:39-298,A:361-433 Chitinase 1                                                                                                                                                                                                                              d2a3ca2 A:299-360 Chitinase 1                                 d2a3ca1 A:39-298,A:361-433 Chitinase 1                                    SCOP domains
               CATH domains 2a3cA01 A:39-297,A:361-433 Glycosidases                                                                                                                                                                                                                            2a3cA02 A:298-360  [code=3.10.50.10, no name defined]          2a3cA01 A:39-297,A:361-433 Glycosidases                                   CATH domains
               Pfam domains ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author .....eeeeeee.hhhh....hhhhhhhhhh.eeeeeeeee......eee.hhhhhhh...............hhhhhhhhhhhhhh...eeeeeee...hhhhhhhhhhhhhhhhhhhhhhhhhhhhhh..eeeee.....hhhhhhhhhhhhhhhhhhhhhhhhhhh.....eeeeee..hhhhhhhhhhhhhhh...eeee........................hhhhh..hhhhhhhhhhhh..hhh.eeeeee.eeeee.....................eee.hhh.....eeeeehhhheeeeee....eeee..hhhhhhhhhhhhhhhh..eeeeehhhhh.hhhhhhhhhhhhhh.hhhhh.............hhhhhh.... Sec.struct. author
                 SAPs(SNPs) ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE ----------------------------------------------------------------------------------------------------------------------------------CHITINASE---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- PROSITE
                 Transcript ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 2a3c A  39 ASSGYRSVVYFVNWAIYGRNHNPQDLPVERLTHVLYAFANVRPETGEVYMTDSWADIEKHYPGDSWSDTGNNVYGCIKQLYLLKKQNRNLKVLLSIGGWTYSPNFAPAASTDAGRKNFAKTAVKLLQDLGFDGLDIDWEYPENDQQANDFVLLLKEVRTALDSYSAANAGGQHFLLTVASPAGPDKIKVLHLKDMDQQLDFWNLMAYDYAGSFSSLSGHQANVYNDTSNPLSTPFNTQTALDLYRAGGVPANKIVLGMPLYGRSFANTDGPGKPYNGVGQGSWENGVWDYKALPQAGATEHVLPDIMASYSYDATNKFLISYDNPQVANLKSGYIKSLGLGGAMWWDSSSDKTGSDSLITTVVNALGGTGVFEQSQNELDYPVSQYDNLRNGMQT 433
                                    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       418       428     

Chain B from PDB  Type:PROTEIN  Length:394
 aligned with CHIB1_ASPFM | Q873X9 from UniProtKB/Swiss-Prot  Length:433

    Alignment length:394
                                    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       418       428    
          CHIB1_ASPFM    39 ASSGYRSVVYFVNWAIYGRNHNPQDLPVERLTHVLYAFANVRPETGEVYMTDSWADIEKHYPGDSWSDTGNNVYGCIKQLYLLKKQNRNLKVLLSIGGWTYSPNFAPAASTDAGRKNFAKTAVKLLQDLGFDGLDIDWEYPENDQQANDFVLLLKEVRTALDSYSAANAGGQHFLLTVASPAGPDKIKVLHLKDMDQQLDFWNLMAYDYAGSFSSLSGHQANVYNDTSNPLSTPFNTQTALDLYRAGGVPANKIVLGMPLYGRSFANTDGPGKPYNGVGQGSWENGVWDYKALPQAGATEHVLPDIMASYSYDATNKFLISYDNPQVANLKSGYIKSLGLGGAMWWDSSSDKTGSDSLITTVVNALGGTGVFEQSQNELDYPVSQYDNLRNGMQ 432
               SCOP domains d2a3cb1 B:39-298,B:361-432 Chitinase 1                                                                                                                                                                                                                              d2a3cb2 B:299-360 Chitinase 1                                 d2a3cb1 B:39-298,B:361-432 Chitinase 1                                   SCOP domains
               CATH domains 2a3cB01 B:39-297,B:361-432 Glycosidases                                                                                                                                                                                                                            2a3cB02 B:298-360  [code=3.10.50.10, no name defined]          2a3cB01 B:39-297,B:361-432 Glycosidases                                  CATH domains
               Pfam domains ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author .....eeeeeee.hhhh....hhhhhhhhhh.eeeeeeeee......eee.hhhhhh................hhhhhhhhhhhhhh...eeeeeee...hhhhhhhhhhhhhhhhhhhhhhhhhhhhhh..eeeee.....hhhhhhhhhhhhhhhhhhhhhhhhhhh.....eeeeee..hhhhhhhhhhhhhhhhh.eeee........................hhhhh..hhhhhhhhhhhh..hhh.eeeeee.eeeee.....................eee.hhh.....eeeeehhhheeeeee....eeee..hhhhhhhhhhhhhhhh..eeeeehhhhh.hhhhhhhhhhhhhhhhhhhh.............hhhhhh... Sec.struct. author
                 SAPs(SNPs) ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE ----------------------------------------------------------------------------------------------------------------------------------CHITINASE--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- PROSITE
                 Transcript ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 2a3c B  39 ASSGYRSVVYFVNWAIYGRNHNPQDLPVERLTHVLYAFANVRPETGEVYMTDSWADIEKHYPGDSWSDTGNNVYGCIKQLYLLKKQNRNLKVLLSIGGWTYSPNFAPAASTDAGRKNFAKTAVKLLQDLGFDGLDIDWEYPENDQQANDFVLLLKEVRTALDSYSAANAGGQHFLLTVASPAGPDKIKVLHLKDMDQQLDFWNLMAYDYAGSFSSLSGHQANVYNDTSNPLSTPFNTQTALDLYRAGGVPANKIVLGMPLYGRSFANTDGPGKPYNGVGQGSWENGVWDYKALPQAGATEHVLPDIMASYSYDATNKFLISYDNPQVANLKSGYIKSLGLGGAMWWDSSSDKTGSDSLITTVVNALGGTGVFEQSQNELDYPVSQYDNLRNGMQ 432
                                    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       418       428    

   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  (2, 4)

Asymmetric Unit

(-) CATH Domains  (2, 4)

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

(-) Pfam Domains  (0, 0)

(no "Pfam Domain" information available for 2A3C)

(-) Gene Ontology  (9, 9)

Asymmetric Unit(hide GO term definitions)
Chain A,B   (CHIB1_ASPFM | Q873X9)
molecular function
    GO:0004568    chitinase activity    Catalysis of the hydrolysis of (1->4)-beta linkages of N-acetyl-D-glucosamine (GlcNAc) polymers of chitin and chitodextrins.
    GO:0016787    hydrolase activity    Catalysis of the hydrolysis of various bonds, e.g. C-O, C-N, C-C, phosphoric anhydride bonds, etc. Hydrolase is the systematic name for any enzyme of EC class 3.
    GO:0016798    hydrolase activity, acting on glycosyl bonds    Catalysis of the hydrolysis of any glycosyl bond.
    GO:0004553    hydrolase activity, hydrolyzing O-glycosyl compounds    Catalysis of the hydrolysis of any O-glycosyl bond.
biological process
    GO:0005975    carbohydrate metabolic process    The chemical reactions and pathways involving carbohydrates, any of a group of organic compounds based of the general formula Cx(H2O)y. Includes the formation of carbohydrate derivatives by the addition of a carbohydrate residue to another molecule.
    GO:0006032    chitin catabolic process    The chemical reactions and pathways resulting in the breakdown of chitin, a linear polysaccharide consisting of beta-(1->4)-linked N-acetyl-D-glucosamine residues.
    GO:0008152    metabolic process    The chemical reactions and pathways, including anabolism and catabolism, by which living organisms transform chemical substances. Metabolic processes typically transform small molecules, but also include macromolecular processes such as DNA repair and replication, and protein synthesis and degradation.
    GO:0000272    polysaccharide catabolic process    The chemical reactions and pathways resulting in the breakdown of a polysaccharide, a polymer of many (typically more than 10) monosaccharide residues linked glycosidically.
cellular component
    GO:0005576    extracellular region    The space external to the outermost structure of a cell. For cells without external protective or external encapsulating structures this refers to space outside of the plasma membrane. This term covers the host cell environment outside an intracellular parasite.

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 Related Entries

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

UniProtKB/Swiss-Prot
        CHIB1_ASPFM | Q873X91w9p 1w9u 1w9v 1wno 2a3a 2a3b 2a3e 2iuz 3ch9 3chc 3chd 3che 3chf

(-) Related Entries Specified in the PDB File

1w9p CRYSTAL STRUCTURE OF ASPERGILLUS FUMIGATUS CHITINASE B1
1w9u CRYSTAL STRUCTURE OF ASPERGILLUS FUMIGATUS CHITINASE B1 IN COMPLEX WITH ARGADIN
1w9v CRYSTAL STRUCTURE OF ASPERGILLUS FUMIGATUS CHITINASE B1 IN COMPLEX WITH ARGIFIN
2a3a CRYSTAL STRUCTURE OF ASPERGILLUS FUMIGATUS CHITINASE B1 IN COMPLEX WITH THEOPHYLLINE
2a3b CRYSTAL STRUCTURE OF ASPERGILLUS FUMIGATUS CHITINASE B1 IN COMPLEX WITH CAFFEINE
2a3e CRYSTAL STRUCTURE OF ASPERGILLUS FUMIGATUS CHITINASE B1 IN COMPLEX WITH ALLOSAMIDIN