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(-) Description

Title :  CRYSTAL STRUCTURE OF HUMAN ABH3 IN COMPLEX WITH IRON ION AND 2-OXOGLUTARATE
 
Authors :  O. Sundheim, C. B. Vagbo, M. Bjoras, M. M. L. Desousa, V. Talstad, P. A. Aas, F. Drablos, H. E. Krokan, J. A. Tainer, G. Slupphaug
Date :  07 Jun 06  (Deposition) - 26 Jul 06  (Release) - 22 Dec 09  (Revision)
Method :  X-RAY DIFFRACTION
Resolution :  1.50
Chains :  Asym. Unit :  A
Biol. Unit 1:  A  (2x)
Keywords :  Oxidoreductase, Dna/Rna Repair, Demethylase, Beta Jellyroll (Keyword Search: [Gene Ontology, PubMed, Web (Google))
 
Reference :  O. Sundheim, C. B. Vagbo, M. Bjoras, M. M. L. Desousa, V. Talstad, P. A. Aas, F. Drablos, H. E. Krokan, J. A. Tainer, G. Slupphaug
Human Abh3 Structure And Key Residues For Oxidative Demethylation To Reverse Dna/Rna Damage.
Embo J. V. 25 3389 2006
PubMed-ID: 16858410  |  Reference-DOI: 10.1038/SJ.EMBOJ.7601219

(-) Compounds

Molecule 1 - ALKYLATED REPAIR PROTEIN ALKB HOMOLOG 3
    ChainsA
    EC Number1.14.11.-
    EngineeredYES
    Expression SystemESCHERICHIA COLI
    Expression System PlasmidPET28A
    Expression System StrainBL21(DE3)
    Expression System Taxid469008
    Expression System VariantRIL
    FragmentRESIDUES 70-286
    Organism CommonHUMAN
    Organism ScientificHOMO SAPIENS
    Organism Taxid9606
    Other Details2-MERCAPTOETHANOLS COVALENTLY LINKED TO C91, C110, AND C201
    SynonymHUMAN ALKB HOMOLOGUE 3, PROSTATE CANCER ANTIGEN 1, DEPC-1, ALKYLATED REPAIR PROTEIN HUMAN ALKB HOMOLOG 3

 Structural Features

(-) Chains, Units

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

Summary Information (see also Sequences/Alignments below)

(-) Ligands, Modified Residues, Ions  (4, 9)

Asymmetric Unit (4, 9)
No.NameCountTypeFull Name
1AKG1Ligand/Ion2-OXOGLUTARIC ACID
2BME4Ligand/IonBETA-MERCAPTOETHANOL
3FE3Ligand/IonFE (III) ION
4LED1Mod. Amino Acid(4R)-5-OXO-L-LEUCINE
Biological Unit 1 (3, 12)
No.NameCountTypeFull Name
1AKG2Ligand/Ion2-OXOGLUTARIC ACID
2BME8Ligand/IonBETA-MERCAPTOETHANOL
3FE-1Ligand/IonFE (III) ION
4LED2Mod. Amino Acid(4R)-5-OXO-L-LEUCINE

(-) Sites  (8, 8)

Asymmetric Unit (8, 8)
No.NameEvidenceResiduesDescription
1AC1SOFTWAREHIS A:191 , ASP A:193 , HIS A:257 , AKG A:700 , HOH A:2150BINDING SITE FOR RESIDUE FE A 500
2AC2SOFTWAREARG A:74 , GLU A:75 , HOH A:2006BINDING SITE FOR RESIDUE FE A 501
3AC3SOFTWARESER A:81 , SER A:83 , GLY A:86 , SER A:88 , ASP A:254BINDING SITE FOR RESIDUE FE A 502
4AC4SOFTWARELED A:177 , ASN A:179 , TYR A:181 , HIS A:191 , ASP A:193 , HIS A:257 , VAL A:259 , ARG A:269 , ASN A:271 , ARG A:275 , FE A:500 , HOH A:2150 , HOH A:2225 , HOH A:2226BINDING SITE FOR RESIDUE AKG A 700
5AC5SOFTWARECYS A:91 , GLU A:248BINDING SITE FOR RESIDUE BME A 800
6AC6SOFTWARETHR A:85 , GLU A:166 , GLU A:167 , CYS A:201 , HOH A:2118BINDING SITE FOR RESIDUE BME A 801
7AC7SOFTWARECYS A:110 , PRO A:268 , HOH A:2227BINDING SITE FOR RESIDUE BME A 802
8AC8SOFTWAREASP A:189 , ARG A:258 , PRO A:260 , LYS A:261 , HOH A:2043BINDING SITE FOR RESIDUE BME A 901

(-) SS Bonds  (0, 0)

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

(-) Cis Peptide Bonds  (1, 1)

Asymmetric Unit
No.Residues
1Ser A:83 -Pro A:84

 Sequence-Structure Mapping

(-) SAPs(SNPs)/Variants  (1, 1)

Asymmetric Unit (1, 1)
  dbSNPPDB
No.SourceVariant IDVariantUniProt IDStatusIDChainVariant
1UniProtVAR_026632R164CALKB3_HUMANPolymorphism2271815AR164C

  SNP/SAP Summary Statistics (UniProtKB/Swiss-Prot)
Biological Unit 1 (1, 2)
  dbSNPPDB
No.SourceVariant IDVariantUniProt IDStatusIDChainVariant
1UniProtVAR_026632R164CALKB3_HUMANPolymorphism2271815AR164C

  SNP/SAP Summary Statistics (UniProtKB/Swiss-Prot)

(-) PROSITE Motifs  (1, 1)

Asymmetric Unit (1, 1)
 PROSITEUniProtKBPDB
No.IDACDescriptionIDLocationCountLocation
1FE2OG_OXYPS51471 Fe(2+) 2-oxoglutarate dioxygenase domain profile.ALKB3_HUMAN172-278  1A:172-278
Biological Unit 1 (1, 2)
 PROSITEUniProtKBPDB
No.IDACDescriptionIDLocationCountLocation
1FE2OG_OXYPS51471 Fe(2+) 2-oxoglutarate dioxygenase domain profile.ALKB3_HUMAN172-278  2A:172-278

(-) Exons   (8, 8)

Asymmetric Unit (8, 8)
 ENSEMBLUniProtKBPDB
No.Transcript IDExonExon IDGenome LocationLengthIDLocationLengthCountLocationLength
1.1dENST000003027081dENSE00002194114chr11:43902389-43902729341ALKB3_HUMAN-00--
1.2cENST000003027082cENSE00001248417chr11:43904133-43904281149ALKB3_HUMAN1-27270--
1.3dENST000003027083dENSE00001136406chr11:43904635-43904738104ALKB3_HUMAN27-61351A:67-704
1.4ENST000003027084ENSE00001100883chr11:43905533-4390556735ALKB3_HUMAN62-73121A:71-733
1.5aENST000003027085aENSE00001182888chr11:43908156-4390820348ALKB3_HUMAN73-89171A:73-8917
1.6aENST000003027086aENSE00001182884chr11:43911275-43911378104ALKB3_HUMAN89-124361A:89-12436
1.7ENST000003027087ENSE00001182880chr11:43913591-4391367989ALKB3_HUMAN124-153301A:124-15330
1.10cENST0000030270810cENSE00001100880chr11:43923066-43923275210ALKB3_HUMAN154-223701A:154-22269
1.11cENST0000030270811cENSE00001100892chr11:43940588-4394068699ALKB3_HUMAN224-256331A:231-25626
1.12cENST0000030270812cENSE00002191074chr11:43941468-43941762295ALKB3_HUMAN257-286301A:257-27923

(-) 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:205
 aligned with ALKB3_HUMAN | Q96Q83 from UniProtKB/Swiss-Prot  Length:286

    Alignment length:248
                                    41        51        61        71        81        91       101       111       121       131       141       151       161       171       181       191       201       211       221       231       241       251       261       271        
          ALKB3_HUMAN    32 SHLHQKPGQTWKNKEHHLSDREFVFKEPQQVVRRAPEPRVIDREGVYEISLSPTGVSRVCLYPGFVDVKEADWILEQLCQDVPWKQRTGIREDITYQQPRLTAWYGELPYTYSRITMEPNPHWHPVLRTLKNRIEENTGHTFNSLLCNLYRNEKDSVDWHSDDEPSLGRCPIIASLSFGATRTFEMRKKPPPEENGDYTYVERVKIPLDHGTLLIMEGATQADWQHRVPKEYHSREPRVNLTFRTVYP 279
               SCOP domains ---d                                   2iuwa1 A:70-279 AlkB homolog 3                                                                                                                                                                                    SCOP domains
               CATH domains -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- CATH domains
               Pfam domains -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author ..ee-----------------------------------e....eeeeee......eeeeee....hhhhhhhhhhhhhhhh.....eee....eee...eeeeee......hhhhhh.....hhhhhhhhhhhhhhhh....eeeeeee......eeee...hhhhh....eeeeeee..eeeeeee...--------...eeeeee....eeeeeehhhhheeeee.........eeeeee..... Sec.struct. author
                 SAPs(SNPs) ------------------------------------------------------------------------------------------------------------------------------------C------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE --------------------------------------------------------------------------------------------------------------------------------------------FE2OG_OXY  PDB: A:172-278 UniProt: 172-278                                                                 - PROSITE
           Transcript 1 (1) Exon 1.3d  PDB: A:67-70       Exon 1.4    ---------------Exon 1.6a  PDB: A:89-124            -----------------------------Exon 1.10c  PDB: A:154-222 UniProt: 154-223 [INCOMPLETE]              Exon 1.11c  PDB: A:231-256       Exon 1.12c [INCOMPLETE] Transcript 1 (1)
           Transcript 1 (2) -----------------------------------------Exon 1.5a        ----------------------------------Exon 1.7  PDB: A:124-153      ------------------------------------------------------------------------------------------------------------------------------ Transcript 1 (2)
                 2iuw A  67 SHMR-----------------------------------VIDREGVYEISLSPTGVSRVCLYPGFVDVKEADWILEQLCQDVPWKQRTGIREDITYQQPRLTAWYGELPYTYSRITMEPNPHWHPVLRTLKNRIEENTGHTFNSLlCNLYRNEKDSVDWHSDDEPSLGRCPIIASLSFGATRTFEMRKKPP--------YVERVKIPLDHGTLLIMEGATQADWQHRVPKEYHSREPRVNLTFRTVYP 279
                               |     -         -         -        71        81        91       101       111       121       131       141       151       161       171     | 181       191       201       211       221|      231       241       251       261       271        
                              70                                  71                                                                                                       177-LED                                      222      231                                                

   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  (1, 1)

Asymmetric Unit

(-) CATH Domains  (0, 0)

(no "CATH Domain" information available for 2IUW)

(-) Pfam Domains  (0, 0)

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

(-) Gene Ontology  (21, 21)

Asymmetric Unit(hide GO term definitions)
Chain A   (ALKB3_HUMAN | Q96Q83)
molecular function
    GO:0043734    DNA-N1-methyladenine dioxygenase activity    Catalysis of the oxidative demethylation of N1-methyladenine and N3-methylcytosine in DNA, with concomitant decarboxylation of 2-oxoglutarate and releases oxidized methyl group on N1-methyladenine and N3-methylcytosine as formaldehyde.
    GO:0031418    L-ascorbic acid binding    Interacting selectively and non-covalently with L-ascorbic acid, (2R)-2-[(1S)-1,2-dihydroxyethyl]-4-hydroxy-5-oxo-2,5-dihydrofuran-3-olate; L-ascorbic acid is vitamin C and has co-factor and anti-oxidant activities in many species.
    GO:1990930    RNA N1-methyladenosine dioxygenase activity    Catalysis of the oxidative demethylation of N1-methyladenosine RNA, with concomitant decarboxylation of 2-oxoglutarate and releases oxidized methyl group on N1-methyladenosine as formaldehyde.
    GO:0051747    cytosine C-5 DNA demethylase activity    Catalysis of the reaction: methyl-dCpdG DNA + H2O = dCpdG DNA + methanol. This reaction is the hydrolytic removal of the methyl group on the 5 position of cytosine in DNA.
    GO:0051213    dioxygenase activity    Catalysis of an oxidation-reduction (redox) reaction in which both atoms of oxygen from one molecule of O2 are incorporated into the (reduced) product(s) of the reaction. The two atoms of oxygen may be distributed between two different products.
    GO:0008198    ferrous iron binding    Interacting selectively and non-covalently with ferrous iron, Fe(II).
    GO:0046872    metal ion binding    Interacting selectively and non-covalently with any metal ion.
    GO:0016491    oxidoreductase activity    Catalysis of an oxidation-reduction (redox) reaction, a reversible chemical reaction in which the oxidation state of an atom or atoms within a molecule is altered. One substrate acts as a hydrogen or electron donor and becomes oxidized, while the other acts as hydrogen or electron acceptor and becomes reduced.
    GO:0016706    oxidoreductase activity, acting on paired donors, with incorporation or reduction of molecular oxygen, 2-oxoglutarate as one donor, and incorporation of one atom each of oxygen into both donors    Catalysis of the reaction: A + 2-oxoglutarate + O2 = B + succinate + CO2. This is an oxidation-reduction (redox) reaction in which hydrogen or electrons are transferred from 2-oxoglutarate and one other donor, and one atom of oxygen is incorporated into each donor.
    GO:0005515    protein binding    Interacting selectively and non-covalently with any protein or protein complex (a complex of two or more proteins that may include other nonprotein molecules).
biological process
    GO:0006307    DNA dealkylation involved in DNA repair    The repair of alkylation damage, e.g. the removal of the alkyl group at the O6-position of guanine by O6-alkylguanine-DNA alkyltransferase (AGT).
    GO:0006281    DNA repair    The process of restoring DNA after damage. Genomes are subject to damage by chemical and physical agents in the environment (e.g. UV and ionizing radiations, chemical mutagens, fungal and bacterial toxins, etc.) and by free radicals or alkylating agents endogenously generated in metabolism. DNA is also damaged because of errors during its replication. A variety of different DNA repair pathways have been reported that include direct reversal, base excision repair, nucleotide excision repair, photoreactivation, bypass, double-strand break repair pathway, and mismatch repair pathway.
    GO:0008283    cell proliferation    The multiplication or reproduction of cells, resulting in the expansion of a cell population.
    GO:0006974    cellular response to DNA damage stimulus    Any process that results in a change in state or activity of a cell (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of a stimulus indicating damage to its DNA from environmental insults or errors during metabolism.
    GO:0055114    oxidation-reduction process    A metabolic process that results in the removal or addition of one or more electrons to or from a substance, with or without the concomitant removal or addition of a proton or protons.
    GO:0035552    oxidative single-stranded DNA demethylation    Removal of the methyl group from one or more nucleotides within a single-stranded DNA molecule involving the oxidation (i.e. electron loss) of one or more atoms.
    GO:0035553    oxidative single-stranded RNA demethylation    Removal of the methyl group from one or more nucleotides within a single-stranded RNA molecule involving the oxidation (i.e. electron loss) of one or more atoms.
cellular component
    GO:0005737    cytoplasm    All of the contents of a cell excluding the plasma membrane and nucleus, but including other subcellular structures.
    GO:0005739    mitochondrion    A semiautonomous, self replicating organelle that occurs in varying numbers, shapes, and sizes in the cytoplasm of virtually all eukaryotic cells. It is notably the site of tissue respiration.
    GO:0005654    nucleoplasm    That part of the nuclear content other than the chromosomes or the nucleolus.
    GO:0005634    nucleus    A membrane-bounded organelle of eukaryotic cells in which chromosomes are housed and replicated. In most cells, the nucleus contains all of the cell's chromosomes except the organellar chromosomes, and is the site of RNA synthesis and processing. In some species, or in specialized cell types, RNA metabolism or DNA replication may be absent.

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