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(-) Description

Title :  CRYSTAL STRUCTURES OF THE MTHK RCK DOMAIN IN CA2+ BOUND FORM
 
Authors :  J. Dong, N. Shi, I. Berke, L. Chen, Y. Jiang
Date :  22 Jul 05  (Deposition) - 25 Oct 05  (Release) - 24 Feb 09  (Revision)
Method :  X-RAY DIFFRACTION
Resolution :  1.70
Chains :  Asym./Biol. Unit :  A,B
Keywords :  Rossmann Fold, Helix-Turn-Helix, Ca2+ Binding, Flexible Interface, Bilobed Architecture, Metal Transport, Membrane Protein (Keyword Search: [Gene Ontology, PubMed, Web (Google)] )
 
Reference :  J. Dong, N. Shi, I. Berke, L. Chen, Y. Jiang
Structures Of The Mthk Rck Domain And The Effect Of Ca2+ On Gating Ring Stability
J. Biol. Chem. V. 280 41716 2005
PubMed-ID: 16227203  |  Reference-DOI: 10.1074/JBC.M508144200
(for further references see the PDB file header)

(-) Compounds

Molecule 1 - CALCIUM-GATED POTASSIUM CHANNEL MTHK
    Chains: A, B
    Engineered: YES
    Expression System: ESCHERICHIA COLI
    Expression System Plasmid: PQE70
    Expression System Strain: M15
    Expression System Taxid: 562
    Expression System Vector Type: PLASMID
    Fragment: ISOFORM SOLUBLE
    Gene: MTHK
    Organism Scientific: METHANOTHERMOBACTER THERMAUTOTROPHICUS
    Organism Taxid: 145262

 Structural Features

(-) Chains, Units

  12
Asymmetric/Biological Unit : AB

Summary Information (see also Sequences/Alignments below)

(-) Ligands, Modified Residues, Ions  (1, 2)

Asymmetric/Biological Unit (1, 2)
No.NameCountTypeFull Name
1CA2Ligand/IonCALCIUM ION

(-) Sites  (2, 2)

Asymmetric Unit (2, 2)
No.NameEvidenceResiduesDescription
1AC1SOFTWAREASP B:184 , GLU B:210 , GLU B:212 , HOH B:651 , HOH B:742 , HOH B:750BINDING SITE FOR RESIDUE CA B 601
2AC2SOFTWAREASP A:184 , GLU A:210 , GLU A:212 , HOH A:698 , HOH A:716 , HOH A:757BINDING SITE FOR RESIDUE CA A 602

(-) SS Bonds  (0, 0)

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

(-) Cis Peptide Bonds  (0, 0)

(no "Cis Peptide Bond" information available for 2AEF)

 Sequence-Structure Mapping

(-) SAPs(SNPs)/Variants  (0, 0)

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

(-) PROSITE Motifs  (2, 4)

Asymmetric/Biological Unit (2, 4)
 PROSITEUniProtKBPDB
No.IDACDescriptionIDLocationCountLocation
1RCK_NPS51201 RCK N-terminal domain profile.MTHK_METTH117-237
 		  2A:117-237
B:117-237
2RCK_CPS51202 RCK C-terminal domain profile.MTHK_METTH252-336
 		  2A:252-336
B:252-334

(-) Exons   (0, 0)

(no "Exon" information available for 2AEF)

(-) Sequences/Alignments

Asymmetric/Biological 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:221
 aligned with MTHK_METTH | O27564 from UniProtKB/Swiss-Prot  Length:336

    Alignment length:224
                                                                                                                                                                                                                                                      336   
                                   125       135       145       155       165       175       185       195       205       215       225       235       245       255       265       275       285       295       305       315       325       335|   
           MTHK_METTH   116 RHVVICGWSESTLECLRELRGSEVFVLAEDENVRKKVLRSGANFVHGDPTRVSDLEKANVRGARAVIVDLESDSETIHCILGIRKIDESVRIIAEAERYENIEQLRMAGADQVISPFVISGRLMSRSIDDGYEAMFVQDVLAEESTRRMVEVPIPEGSKLEGVSVLDADIHDVTGVIIIGVGRGDELIIDPPRDYSFRAGDIILGIGKPEEIERLKNYISA---   -
               SCOP domains d2aefa1 A:116-244 Potassium channel-related protein MthK                                                                         d2aefa2 A:245   -339 Potassium channel-related protein MthK, C-terminal domain                  SCOP domains
               CATH domains 2aefA01 A:116-230 NAD(P)-binding Rossmann-like Domain                                                              2aefA02 A:231-257          ---2aefA03 A:261-339 TrkA C-terminal domain-like                                   CATH domains
               Pfam domains -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author .eeeee..hhhhhhhhhhh...eeeeee.hhhhhhhhhhh..eeee....hhhhhhhh......eeee...hhhhhhhhhhhhhhhh...eeeee..hhhhhhhhhhhh..eeehhhhhhhhhhhhh...hhhhhhhhhhhh---..eeeeee..........hhhhhhhhhhhh.eeeeeee..eeee............eeeeeehhhhhhhhhhhhh.... Sec.struct. author
                 SAPs(SNPs) -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE -RCK_N  PDB: A:117-237 UniProt: 117-237                                                                                   --------------RCK_C  PDB: A:252-336 UniProt: 252-336                                               --- PROSITE
                 Transcript -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 2aef A 116 RHVVICGWSESTLECLRELRGSEVFVLAEDENVRKKVLRSGANFVHGDPTRVSDLEKANVRGARAVIVDLESDSETIHCILGIRKIDESVRIIAEAERYENIEQLRMAGADQVISPFVISGRLMSRSIDDGYEAMFVQDVLA---TRRMVEVPIPEGSKLEGVSVLDADIHDVTGVIIIGVGRGDELIIDPPRDYSFRAGDIILGIGKPEEIERLKNYISALVP 339
                                   125       135       145       155       165       175       185       195       205       215       225       235       245       255 |   | 265       275       285       295       305       315       325       335    
                                                                                                                                                                       257 261                                                                              


Chain B from PDB  Type:PROTEIN  Length:219
 aligned with MTHK_METTH | O27564 from UniProtKB/Swiss-Prot  Length:336

    Alignment length:219
                                   125       135       145       155       165       175       185       195       205       215       225       235       245       255       265       275       285       295       305       315       325         
           MTHK_METTH   116 RHVVICGWSESTLECLRELRGSEVFVLAEDENVRKKVLRSGANFVHGDPTRVSDLEKANVRGARAVIVDLESDSETIHCILGIRKIDESVRIIAEAERYENIEQLRMAGADQVISPFVISGRLMSRSIDDGYEAMFVQDVLAEESTRRMVEVPIPEGSKLEGVSVLDADIHDVTGVIIIGVGRGDELIIDPPRDYSFRAGDIILGIGKPEEIERLKNYI 334
               SCOP domains d2aefb1 B:116-244 Potassium channel-related protein MthK                                                                         d2aefb2 B:245-334 Potassium channel-related protein MthK, C-terminal domain                SCOP domains
               CATH domains 2aefB01 B:116-230 NAD(P)-binding Rossmann-like Domain                                                              2aefB02 B:231-258           2aefB03 B:259-334 TrkA C-terminal domain-like                                CATH domains
               Pfam domains --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author ..eeee..hhhhhhhhhhh....eeeee.hhhhhhhhhhh..eeee....hhhhhhhh......eeee...hhhhhhhhhhhhhhhh...eeeee..hhhhhhhhhhhh..eeehhhhhhhhhhhh....hhhhhhhhhhh......eeeeee..........hhhhhhhhhhhh.eeeeeee..eeee............eeeeeehhhhhhhhhhhh Sec.struct. author
                 SAPs(SNPs) --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE -RCK_N  PDB: B:117-237 UniProt: 117-237                                                                                   --------------RCK_C  PDB: B:252-334 UniProt: 252-336                                              PROSITE
                 Transcript --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 2aef B 116 RHVVICGWSESTLECLRELRGSEVFVLAEDENVRKKVLRSGANFVHGDPTRVSDLEKANVRGARAVIVDLESDSETIHCILGIRKIDESVRIIAEAERYENIEQLRMAGADQVISPFVISGRLMSRSIDDGYEAMFVQDVLAEESTRRMVEVPIPEGSKLEGVSVLDADIHDVTGVIIIGVGRGDELIIDPPRDYSFRAGDIILGIGKPEEIERLKNYI 334
                                   125       135       145       155       165       175       185       195       205       215       225       235       245       255       265       275       285       295       305       315       325
   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/Biological Unit
(-)
Class: Alpha and beta proteins (a+b) (23004)
(-)
Class: Alpha and beta proteins (a/b) (23833)

(-) CATH Domains  (3, 6)

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

(-) Pfam Domains  (0, 0)

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

(-) Gene Ontology  (10, 10)

Asymmetric/Biological Unit(hide GO term definitions)
Chain A,B   (MTHK_METTH | O27564)
molecular function
    GO:0008324    cation transmembrane transporter activity    Enables the transfer of cation from one side of the membrane to the other.
    GO:0042802    identical protein binding    Interacting selectively and non-covalently with an identical protein or proteins.
    GO:0046872    metal ion binding    Interacting selectively and non-covalently with any metal ion.
biological process
    GO:0098655    cation transmembrane transport    A process in which a cation is transported from one side of a membrane to the other by means of some agent such as a transporter or pore.
    GO:0006811    ion transport    The directed movement of charged atoms or small charged molecules into, out of or within a cell, or between cells, by means of some agent such as a transporter or pore.
    GO:0006813    potassium ion transport    The directed movement of potassium ions (K+) into, out of or within a cell, or between cells, by means of some agent such as a transporter or pore.
    GO:0006810    transport    The directed movement of substances (such as macromolecules, small molecules, ions) or cellular components (such as complexes and organelles) into, out of or within a cell, or between cells, or within a multicellular organism by means of some agent such as a transporter, pore or motor protein.
cellular component
    GO:0016021    integral component of membrane    The component of a membrane consisting of the gene products and protein complexes having at least some part of their peptide sequence embedded in the hydrophobic region of the membrane.
    GO:0016020    membrane    A lipid bilayer along with all the proteins and protein complexes embedded in it an attached to it.
    GO:0005886    plasma membrane    The membrane surrounding a cell that separates the cell from its external environment. It consists of a phospholipid bilayer and associated proteins.

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  2aef
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 Related Entries

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

UniProtKB/Swiss-Prot
        MTHK_METTH | O27564: 1lnq 2aej 2aem 2fy8 2ogu 3kxd 3ldc 3ldd 3lde 3ous 3r65 3rbx 3rbz 4ei2 4hyo 4hz3 4l73 4l74 4l75 4l76 4qe7 4qe9 4ro0

(-) Related Entries Specified in the PDB File

1lnq THE SAME PROTEIN WITH TRANSMEMBRANE DOMAIN
2aej
2aem