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(-) Description

Title :  A CLOSER LOOK AT THE ACTIVE SITE OF GAMMA-CARBONIC ANHYDRASES: HIGH RESOLUTION CRYSTALLOGRAPHIC STUDIES OF THE CARBONIC ANHYDRASE FROM METHANOSARCINA THERMOPHILA
 
Authors :  T. M. Iverson, B. E. Alber, C. Kisker, J. G. Ferry, D. C. Rees
Date :  13 Jun 99  (Deposition) - 25 Jun 99  (Release) - 13 Jul 11  (Revision)
Method :  X-RAY DIFFRACTION
Resolution :  1.46
Chains :  Asym. Unit :  A
Biol. Unit 1:  A  (3x)
Keywords :  Beta-Helix, Lyase (Keyword Search: [Gene Ontology, PubMed, Web (Google)] )
 
Reference :  T. M. Iverson, B. E. Alber, C. Kisker, J. G. Ferry, D. C. Rees
A Closer Look At The Active Site Of Gamma-Class Carbonic Anhydrases: High-Resolution Crystallographic Studies Of The Carbonic Anhydrase From Methanosarcina Thermophila.
Biochemistry V. 39 9222 2000
PubMed-ID: 10924115  |  Reference-DOI: 10.1021/BI000204S
(for further references see the PDB file header)

(-) Compounds

Molecule 1 - CARBONIC ANHYDRASE
    Chains: A
    Engineered: YES
    Expression System: ESCHERICHIA COLI
    Expression System Taxid: 562
    Organism Scientific: METHANOSARCINA THERMOPHILA
    Organism Taxid: 2210

 Structural Features

(-) Chains, Units

  1
Asymmetric Unit : A
Biological Unit 1 (3x): A

Summary Information (see also Sequences/Alignments below)

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

Asymmetric Unit (2, 2)
No.NameCountTypeFull Name
1BCT1Ligand/IonBICARBONATE ION
2CO1Ligand/IonCOBALT (II) ION
Biological Unit 1 (1, 3)
No.NameCountTypeFull Name
1BCT3Ligand/IonBICARBONATE ION
2CO-1Ligand/IonCOBALT (II) ION

(-) Sites  (2, 2)

Asymmetric Unit (2, 2)
No.NameEvidenceResiduesDescription
1AC1SOFTWAREGLU A:62 , GLN A:75 , HIS A:81 , HIS A:117 , VAL A:198 , ASN A:202 , CO A:214 , HOH A:217 , HOH A:222 , HOH A:322 , HOH A:323BINDING SITE FOR RESIDUE BCT A 215
2AC2SOFTWAREHIS A:81 , HIS A:117 , HIS A:122 , BCT A:215 , HOH A:322 , HOH A:323BINDING SITE FOR RESIDUE CO A 214

(-) SS Bonds  (0, 0)

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

(-) Cis Peptide Bonds  (2, 2)

Asymmetric Unit
No.Residues
1Met A:64 -Pro A:65
2Gly A:123 -Pro A:124

 Sequence-Structure Mapping

(-) SAPs(SNPs)/Variants  (0, 0)

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

(-) PROSITE Motifs  (0, 0)

(no "PROSITE Motif" information available for 1QRE)

(-) Exons   (0, 0)

(no "Exon" information available for 1QRE)

(-) 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:210
 aligned with CAH_METTE | P40881 from UniProtKB/Swiss-Prot  Length:247

    Alignment length:210
                                    47        57        67        77        87        97       107       117       127       137       147       157       167       177       187       197       207       217       227       237       247
            CAH_METTE    38 TVDEFSNIRENPVTPWNPEPSAPVIDPTAYIDPQASVIGEVTIGANVMVSPMASIRSDEGMPIFVGDRSNVQDGVVLHALETINEEGEPIEDNIVEVDGKEYAVYIGNNVSLAHQSQVHGPAAVGDDTFIGMQAFVFKSKVGNNCVLEPRSAAIGVTIPDGRYIPAGMVVTSQAEADKLPEVTDDYAYSHTNEAVVYVNVHLAEGYKETS 247
               SCOP domains d1qrea_ A: gamma-carbonic anhydrase                                                                                                                                                                                SCOP domains
               CATH domains 1qreA00 A:4-213 Hexapeptide repeat proteins                                                                                                                                                                        CATH domains
           Pfam domains (1) ------------------------------------------------------------------------------------------------------Hexapep-1qreA01 A:106-141           ------------------------------------------------------------------------ Pfam domains (1)
           Pfam domains (2) ------------------------------------------------------------------------------------------------------Hexapep-1qreA02 A:106-141           ------------------------------------------------------------------------ Pfam domains (2)
         Sec.struct. author ......eee..............eee...eee...eeeeeeeee..eeee..eeeee....eeeee..eeee..eeee...........hhhhheee..eeeeeeee..eeee..eeeeeeeeee..eeee..eeeeeeeee..eeee..eeeeeeee...eee...eee.hhhhhhh...........hhhhhhhhhhhhhhhhhhh.. Sec.struct. author
                 SAPs(SNPs) ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ SAPs(SNPs)
                    PROSITE ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ PROSITE
                 Transcript ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ Transcript
                 1qre A   4 TVDEFSNIRENPVTPWNPEPSAPVIDPTAYIDPQASVIGEVTIGANVMVSPMASIRSDEGMPIFVGDRSNVQDGVVLHALETINEEGEPIEDNIVEVDGKEYAVYIGNNVSLAHQSQVHGPAAVGDDTFIGMQAFVFKSKVGNNCVLEPRSAAIGVTIPDGRYIPAGMVVTSQAEADKLPEVTDDYAYSHTNEAVVYVNVHLAEGYKETS 213
                                    13        23        33        43        53        63        73        83        93       103       113       123       133       143       153       163       173       183       193       203       213
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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  (1, 1)

Asymmetric Unit
(-)
Class: All beta proteins (24004)

(-) CATH Domains  (1, 1)

Asymmetric Unit
(-)
Class: Mainly Beta (13760)

(-) Pfam Domains  (1, 2)

Asymmetric Unit
(-)
Clan: no clan defined [family: Hexapep] (52)

(-) Gene Ontology  (3, 3)

Asymmetric Unit(hide GO term definitions)
Chain A   (CAH_METTE | P40881)
molecular function
    GO:0004089    carbonate dehydratase activity    Catalysis of the reaction: H2CO3 = CO2 + H2O.
    GO:0016829    lyase activity    Catalysis of the cleavage of C-C, C-O, C-N and other bonds by other means than by hydrolysis or oxidation, or conversely adding a group to a double bond. They differ from other enzymes in that two substrates are involved in one reaction direction, but only one in the other direction. When acting on the single substrate, a molecule is eliminated and this generates either a new double bond or a new ring.
    GO:0046872    metal ion binding    Interacting selectively and non-covalently with any metal ion.

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 Related Entries

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

UniProtKB/Swiss-Prot
        CAH_METTE | P40881: 1qq0 1qrf 1qrg 1qrl 1qrm 1thj 3otm 3otz 3ou9 3oup 3ow5

(-) Related Entries Specified in the PDB File

1qq0 COBALT SUBSTITUTED CARBONIC ANHYDRASE
1qrf COBALT SUBSTITUTED CARBONIC ANHYDRASE + SULFATE
1qrg CARBONIC ANHYDRASE
1qrl CARBONIC ANHYDRASE + BICARBONATE
1qrm CARBONIC ANHYDRASE + SULFATE
1thj CARBONIC ANHYDRASE