Q18KI0 · KAE1B_HALWD

Function

function

Required for the formation of a threonylcarbamoyl group on adenosine at position 37 (t6A37) in tRNAs that read codons beginning with adenine. Is a component of the KEOPS complex that is probably involved in the transfer of the threonylcarbamoyl moiety of threonylcarbamoyl-AMP (TC-AMP) to the N6 group of A37. The Kae1 domain likely plays a direct catalytic role in this reaction. The Bud32 domain probably displays kinase activity that regulates Kae1 function.

Catalytic activity

Cofactor

Fe2+ (UniProtKB | Rhea| CHEBI:29033 )

Note: Binds 1 Fe2+ ion per subunit.

Features

Showing features for binding site, active site.

TypeIDPosition(s)Description
Binding site112Fe cation (UniProtKB | ChEBI)
Binding site116Fe cation (UniProtKB | ChEBI)
Binding site133-137L-threonylcarbamoyladenylate (UniProtKB | ChEBI)
Binding site165L-threonylcarbamoyladenylate (UniProtKB | ChEBI)
Binding site178L-threonylcarbamoyladenylate (UniProtKB | ChEBI)
Binding site182L-threonylcarbamoyladenylate (UniProtKB | ChEBI)
Binding site261L-threonylcarbamoyladenylate (UniProtKB | ChEBI)
Binding site289Fe cation (UniProtKB | ChEBI)
Binding site347-354ATP (UniProtKB | ChEBI)
Binding site363ATP (UniProtKB | ChEBI)
Active site452Proton acceptor; for kinase activity

GO annotations

AspectTerm
Cellular Componentcytoplasm
Cellular ComponentEKC/KEOPS complex
Molecular FunctionATP binding
Molecular Functioniron ion binding
Molecular Functionmetalloendopeptidase activity
Molecular FunctionN(6)-L-threonylcarbamoyladenine synthase activity
Molecular Functionprotein serine kinase activity
Molecular Functionprotein serine/threonine kinase activity
Molecular Functionprotein serine/threonine/tyrosine kinase activity
Molecular Functionzinc ion binding
Biological ProcesstRNA threonylcarbamoyladenosine modification

Keywords

Names & Taxonomy

Protein names

  • Recommended name
    Probable bifunctional tRNA threonylcarbamoyladenosine biosynthesis protein

Including 2 domains:

  • Recommended name
    tRNA N6-adenosine threonylcarbamoyltransferase
  • EC number
  • Alternative names
    • N6-L-threonylcarbamoyladenine synthase (t(6)A synthase)
    • t(6)A37 threonylcarbamoyladenosine biosynthesis protein Kae1
    • tRNA threonylcarbamoyladenosine biosynthesis protein Kae1
  • Recommended name
    Serine/threonine-protein kinase Bud32
  • EC number

Gene names

    • Ordered locus names
      HQ_1341A

Organism names

Accessions

  • Primary accession
    Q18KI0

Proteomes

Subcellular Location

Keywords

PTM/Processing

Features

Showing features for chain.

TypeIDPosition(s)Description
ChainPRO_00003036491-533Probable bifunctional tRNA threonylcarbamoyladenosine biosynthesis protein

Interaction

Subunit

Component of the KEOPS complex that consists of Kae1, Bud32, Cgi121 and Pcc1; the whole complex dimerizes.

Protein-protein interaction databases

Structure

Family & Domains

Features

Showing features for region, domain.

TypeIDPosition(s)Description
Region1-328Kae1
Domain339-533Protein kinase

Sequence similarities

In the N-terminal section; belongs to the KAE1 / TsaD family.
In the C-terminal section; belongs to the protein kinase superfamily. Tyr protein kinase family. BUD32 subfamily.

Phylogenomic databases

Family and domain databases

Sequence

  • Sequence status
    Complete
  • Length
    533
  • Mass (Da)
    57,542
  • Last updated
    2006-07-25 v1
  • Checksum
    A504147E944A27A2
MRILGIEGTAWAASAALYNTHDETIVIESDPYQPDSGGLHPREAAEHMSTALPEVISTILERAVSSGNTDAIGIDAIAFSRGPGLGPCLRVVGTAARTLTQALSVPLIGVNHMIAHLEIGRHQSGFTTPVCLNASGANAHLLGYHRRQYQVLGETMDTGVGNAIDKFTRHLGWNHPGGPKVEAAATDGSYHDLPYVVKGMDFSFSGIMSAAKDAVDNEVPVVDVCTGLQETIFAMLTEVAERALSLTGSNELVLGGGVGQNDRLREMLSTMCTARGASFYAPESRFLRDNAGMIAVLGAAMYEAGQTISVNDSAVDPTFRPDAVTVTWRDDETSVTRTPATLDKTPVRGAEAIVRRINDHVVKRRVEKSYRHPKLDRRLRAERTRAEARLTSAARRLGVPTPLIFDADPETGTLVFEYVGETDLAADLTVSRCHAVGQHLGRIHNAGFVHGDPTTRNVRVDSAQNYLIDFGLGYHTDHVEDHAMDLHVFIQSVTGTASDPAPLITAFESGYAETGISTVQSRLRDIESRGRYH

Keywords

Sequence databases

Nucleotide SequenceProtein SequenceMolecule TypeStatus
AM180088
EMBL· GenBank· DDBJ
CAJ51469.1
EMBL· GenBank· DDBJ
Genomic DNA

Genome annotation databases

Similar Proteins

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