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UniProtKB - P45748 (TSAC_ECOLI)

Entry version 145 (05 Jun 2019)
Sequence version 2 (15 Jul 1998)
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Protein

Threonylcarbamoyl-AMP synthase

Gene

tsaC

Organism
Escherichia coli (strain K12)
Status
Reviewed-Annotation score:

Annotation score:5 out of 5

<p>The annotation score provides a heuristic measure of the annotation content of a UniProtKB entry or proteome. This score <strong>cannot</strong> be used as a measure of the accuracy of the annotation as we cannot define the ‘correct annotation’ for any given protein.<p><a href='/help/annotation_score' target='_top'>More...</a></p>-Experimental evidence at protein leveli <p>This indicates the type of evidence that supports the existence of the protein. Note that the ‘protein existence’ evidence does not give information on the accuracy or correctness of the sequence(s) displayed.<p><a href='/help/protein_existence' target='_top'>More...</a></p>

<p>This section provides any useful information about the protein, mostly biological knowledge.<p><a href='/help/function_section' target='_top'>More...</a></p>Functioni

Required for the formation of a threonylcarbamoyl group on adenosine at position 37 (t6A37) in tRNAs that read codons beginning with adenine. Catalyzes the conversion of L-threonine, HCO3-/CO2 and ATP to give threonylcarbamoyl-AMP (TC-AMP) as the acyladenylate intermediate, with the release of diphosphate. Is also able to catalyze the reverse reaction in vitro, i.e. the formation of ATP from TC-AMP and PPi. Shows higher affinity for the full-length tRNA(Thr) lacking only the t6A37 modification than for its fully modified counterpart. Could also be required for the maturation of 16S rRNA. Binds to double-stranded RNA but does not interact tightly with either of the ribosomal subunits, or the 70S particles.UniRule annotation5 Publications

Miscellaneous

TsaBCDE are necessary and sufficient for tRNA(NNU) t6A37 threonylcarbamoyladenosine modification in vitro in E.coli.1 Publication
Unlike previously thought, the formation of TC-AMP does not proceed via an ATP-activated HCO3- intermediate such as carboxy-AMP.1 Publication

Caution

Was also proposed to catalyze the transfer of the threonylcarbamoyl moiety of TC-AMP to the N6 group of A37 (PubMed:21285948 and PubMed:21775474). However, it was shown that this reaction is catalyzed in B.subtilis by the TsaEBD proteins (PubMed:23072323).1 Publication
The well-known t6A modification appears to be a hydrolyzed artifact of natural cyclic t6A (ct6A) that occurs during the preparation and handling of tRNA in E.coli and many other species (PubMed:23242255). In these species, the t6A modification is processed further by dehydration into ct6A, a reaction catalyzed by TcdA.Curated

<p>This subsection of the <a href="http://www.uniprot.org/help/function_section">Function</a> section describes the catalytic activity of an enzyme, i.e. a chemical reaction that the enzyme catalyzes.<p><a href='/help/catalytic_activity' target='_top'>More...</a></p>Catalytic activityi

<p>This subsection of the ‘Function’ section describes biophysical and chemical properties, such as maximal absorption, kinetic parameters, pH dependence, redox potentials and temperature dependence.<p><a href='/help/biophysicochemical_properties' target='_top'>More...</a></p>Kineticsi

kcat is 0.10 sec(-1) for ATP-dependent TC-AMP formation and 20 sec(-1) for the reverse reaction.
  1. KM=93 µM for ATP1 Publication
  2. KM=0.68 µM for L-threonylcarbamoyl-AMP1 Publication

    <p>The <a href="http://www.geneontology.org/">Gene Ontology (GO)</a> project provides a set of hierarchical controlled vocabulary split into 3 categories:<p><a href='/help/gene_ontology' target='_top'>More...</a></p>GO - Molecular functioni

    Complete GO annotation on QuickGO ...

    GO - Biological processi

    Complete GO annotation on QuickGO ...

    <p>UniProtKB Keywords constitute a <a href="http://www.uniprot.org/keywords">controlled vocabulary</a> with a hierarchical structure. Keywords summarise the content of a UniProtKB entry and facilitate the search for proteins of interest.<p><a href='/help/keywords' target='_top'>More...</a></p>Keywordsi

    Molecular functionNucleotidyltransferase, RNA-binding, Transferase, tRNA-binding
    Biological processRibosome biogenesis, rRNA processing, tRNA processing
    LigandATP-binding, Nucleotide-binding

    Enzyme and pathway databases

    BioCyc Collection of Pathway/Genome Databases

    More...    BioCyci    		EcoCyc:G7698-MONOMER
    ECOL316407:JW3243-MONOMER
    MetaCyc:G7698-MONOMER

    BRENDA Comprehensive Enzyme Information System

    More...    BRENDAi    		2.7.7.87 2026

    <p>This section provides information about the protein and gene name(s) and synonym(s) and about the organism that is the source of the protein sequence.<p><a href='/help/names_and_taxonomy_section' target='_top'>More...</a></p>Names & Taxonomyi

    <p>This subsection of the <a href="http://www.uniprot.org/help/names_and_taxonomy_section">Names and taxonomy</a> section provides an exhaustive list of all names of the protein, from commonly used to obsolete, to allow unambiguous identification of a protein.<p><a href='/help/protein_names' target='_top'>More...</a></p>Protein namesi
    Recommended name:
    Threonylcarbamoyl-AMP synthaseUniRule annotation (EC:2.7.7.87UniRule annotation)
    Short name:
    TC-AMP synthaseUniRule annotation
    Alternative name(s):
    L-threonylcarbamoyladenylate synthaseUniRule annotation
    Ribosome maturation factor TsaC
    t(6)A37 threonylcarbamoyladenosine biosynthesis protein TsaCUniRule annotation
    tRNA threonylcarbamoyladenosine biosynthesis protein TsaCUniRule annotation
    <p>This subsection of the <a href="http://www.uniprot.org/help/names_and_taxonomy_section">Names and taxonomy</a> section indicates the name(s) of the gene(s) that code for the protein sequence(s) described in the entry. Four distinct tokens exist: ‘Name’, ‘Synonyms’, ‘Ordered locus names’ and ‘ORF names’.<p><a href='/help/gene_name' target='_top'>More...</a></p>Gene namesi
    Name:tsaCUniRule annotation
    Synonyms:rimN, yrdC
    Ordered Locus Names:b3282, JW3243
    <p>This subsection of the <a href="http://www.uniprot.org/help/names_and_taxonomy_section">Names and taxonomy</a> section provides information on the name(s) of the organism that is the source of the protein sequence.<p><a href='/help/organism-name' target='_top'>More...</a></p>OrganismiEscherichia coli (strain K12)
    <p>This subsection of the <a href="http://www.uniprot.org/help/names_and_taxonomy_section">Names and taxonomy</a> section shows the unique identifier assigned by the NCBI to the source organism of the protein. This is known as the ‘taxonomic identifier’ or ‘taxid’.<p><a href='/help/taxonomic_identifier' target='_top'>More...</a></p>Taxonomic identifieri83333 [NCBI]
    <p>This subsection of the <a href="http://www.uniprot.org/help/names_and_taxonomy_section">Names and taxonomy</a> section contains the taxonomic hierarchical classification lineage of the source organism. It lists the nodes as they appear top-down in the taxonomic tree, with the more general grouping listed first.<p><a href='/help/taxonomic_lineage' target='_top'>More...</a></p>Taxonomic lineageiBacteria › Proteobacteria › Gammaproteobacteria › Enterobacterales › Enterobacteriaceae › Escherichia ›
    <p>This subsection of the <a href="http://www.uniprot.org/help/names_and_taxonomy_section">Names and taxonomy</a> section is present for entries that are part of a <a href="http://www.uniprot.org/proteomes">proteome</a>, i.e. of a set of proteins thought to be expressed by organisms whose genomes have been completely sequenced.<p><a href='/help/proteomes_manual' target='_top'>More...</a></p>Proteomesi
    • UP000000318 <p>A UniProt <a href="http://www.uniprot.org/manual/proteomes_manual">proteome</a> can consist of several components. <br></br>The component name refers to the genomic component encoding a set of proteins.<p><a href='/help/proteome_component' target='_top'>More...</a></p> Componenti: Chromosome
    • UP000000625 Componenti: Chromosome

    Organism-specific databases

    Escherichia coli strain K12 genome database

    More...    EcoGenei    		EG12840 tsaC

    <p>This section provides information on the location and the topology of the mature protein in the cell.<p><a href='/help/subcellular_location_section' target='_top'>More...</a></p>Subcellular locationi

    GO - Cellular componenti

    Complete GO annotation on QuickGO ...

    Keywords - Cellular componenti

    Cytoplasm

    <p>This section provides information on the disease(s) and phenotype(s) associated with a protein.<p><a href='/help/pathology_and_biotech_section' target='_top'>More...</a></p>Pathology & Biotechi

    <p>This subsection of the ‘Pathology and Biotech’ section describes the in vivo effects caused by ablation of the gene (or one or more transcripts) coding for the protein described in the entry. This includes gene knockout and knockdown, provided experiments have been performed in the context of a whole organism or a specific tissue, and not at the single-cell level.<p><a href='/help/disruption_phenotype' target='_top'>More...</a></p>Disruption phenotypei

    The knockdown of this gene results in a loss of t6A37 modification in tRNAs.1 Publication

    Mutagenesis

    Feature keyPosition(s)DescriptionActionsGraphical viewLength
    <p>This subsection of the <a href="http://www.uniprot.org/manual/pathology_and_biotech_section">'Pathology and Biotech'</a> section describes the effect of the experimental mutation of one or more amino acid(s) on the biological properties of the protein.<p><a href='/help/mutagen' target='_top'>More...</a></p>Mutagenesisi50K → A: Loss of activity. 1 Publication1
    Mutagenesisi52R → A: Loss of activity. 1 Publication1
    Mutagenesisi56K → A: No change in activity. 1 Publication1
    Mutagenesisi110R → A: No change in activity. 1 Publication1

    <p>This section describes post-translational modifications (PTMs) and/or processing events.<p><a href='/help/ptm_processing_section' target='_top'>More...</a></p>PTM / Processingi

    Molecule processing

    Feature keyPosition(s)DescriptionActionsGraphical viewLength
    <p>This subsection of the ‘PTM / Processing’ section describes the extent of a polypeptide chain in the mature protein following processing.<p><a href='/help/chain' target='_top'>More...</a></p>ChainiPRO_00002020181 – 190Threonylcarbamoyl-AMP synthaseAdd BLAST190

    Proteomic databases

    jPOST - Japan Proteome Standard Repository/Database

    More...    jPOSTi    		P45748

    PaxDb, a database of protein abundance averages across all three domains of life

    More...    PaxDbi    		P45748

    PRoteomics IDEntifications database

    More...    PRIDEi    		P45748

    <p>This section provides information on the quaternary structure of a protein and on interaction(s) with other proteins or protein complexes.<p><a href='/help/interaction_section' target='_top'>More...</a></p>Interactioni

    <p>This subsection of the <a href="http://www.uniprot.org/help/interaction_section">'Interaction'</a> section provides information about the protein quaternary structure and interaction(s) with other proteins or protein complexes (with the exception of physiological receptor-ligand interactions which are annotated in the <a href="http://www.uniprot.org/help/function_section">'Function'</a> section).<p><a href='/help/subunit_structure' target='_top'>More...</a></p>Subunit structurei

    Interacts with TsaB and TsaD.1 Publication

    Protein-protein interaction databases

    The Biological General Repository for Interaction Datasets (BioGrid)

    More...    BioGridi    		4262454, 224 interactors

    Database of interacting proteins

    More...    DIPi    		DIP-12916N

    Protein interaction database and analysis system

    More...    IntActi    		P45748, 12 interactors

    STRING: functional protein association networks

    More...    STRINGi    		511145.b3282

    <p>This section provides information on the tertiary and secondary structure of a protein.<p><a href='/help/structure_section' target='_top'>More...</a></p>Structurei

    Secondary structure

    1190
    Legend: HelixTurnBeta strandPDB Structure known for this area
    Show more details

    3D structure databases

    SWISS-MODEL Repository - a database of annotated 3D protein structure models

    More...    SMRi    		P45748

    Database of comparative protein structure models

    More...    ModBasei    		Search...

    MobiDB: a database of protein disorder and mobility annotations

    More...    MobiDBi    		Search...

    Miscellaneous databases

    Relative evolutionary importance of amino acids within a protein sequence

    More...    EvolutionaryTracei    		P45748

    <p>This section provides information on sequence similarities with other proteins and the domain(s) present in a protein.<p><a href='/help/family_and_domains_section' target='_top'>More...</a></p>Family & Domainsi

    Domains and Repeats

    Feature keyPosition(s)DescriptionActionsGraphical viewLength
    <p>This subsection of the <a href="http://www.uniprot.org/help/family_and_domains_section">Family and Domains</a> section describes the position and type of a domain, which is defined as a specific combination of secondary structures organized into a characteristic three-dimensional structure or fold.<p><a href='/help/domain' target='_top'>More...</a></p>Domaini7 – 190YrdC-likeUniRule annotationAdd BLAST184

    <p>This subsection of the ‘Family and domains’ section provides information about the sequence similarity with other proteins.<p><a href='/help/sequence_similarities' target='_top'>More...</a></p>Sequence similaritiesi

    Belongs to the SUA5 family. TsaC subfamily.UniRule annotation

    Phylogenomic databases

    evolutionary genealogy of genes: Non-supervised Orthologous Groups

    More...    eggNOGi    		ENOG4105EK0 Bacteria
    COG0009 LUCA

    The HOGENOM Database of Homologous Genes from Fully Sequenced Organisms

    More...    HOGENOMi    		HOG000076163

    InParanoid: Eukaryotic Ortholog Groups

    More...    InParanoidi    		P45748

    KEGG Orthology (KO)

    More...    KOi    		K07566

    Database for complete collections of gene phylogenies

    More...    PhylomeDBi    		P45748

    Family and domain databases

    HAMAP database of protein families

    More...    HAMAPi    		MF_01852 TsaC, 1 hit

    Integrated resource of protein families, domains and functional sites

    More...    InterProi    		View protein in InterPro
    IPR017945 DHBP_synth_RibB-like_a/b_dom
    IPR023535 TC-AMP_synthase
    IPR006070 YrdC-like_dom

    The PANTHER Classification System

    More...    PANTHERi    		PTHR17490:SF8 PTHR17490:SF8, 1 hit

    Pfam protein domain database

    More...    Pfami    		View protein in Pfam
    PF01300 Sua5_yciO_yrdC, 1 hit

    Superfamily database of structural and functional annotation

    More...    SUPFAMi    		SSF55821 SSF55821, 1 hit

    PROSITE; a protein domain and family database

    More...    PROSITEi    		View protein in PROSITE
    PS51163 YRDC, 1 hit

    <p>This section displays by default the canonical protein sequence and upon request all isoforms described in the entry. It also includes information pertinent to the sequence(s), including <a href="http://www.uniprot.org/help/sequence_length">length</a> and <a href="http://www.uniprot.org/help/sequences">molecular weight</a>. The information is filed in different subsections. The current subsections and their content are listed below:<p><a href='/help/sequences_section' target='_top'>More...</a></p>Sequencei

    <p>This subsection of the <a href="http://www.uniprot.org/help/sequences_section">Sequence</a> section indicates if the <a href="http://www.uniprot.org/help/canonical_and_isoforms">canonical sequence</a> displayed by default in the entry is complete or not.<p><a href='/help/sequence_status' target='_top'>More...</a></p>Sequence statusi: Complete.

    P45748-1 [UniParc]FASTAAdd to basket
    « Hide
            10         20         30         40         50
    MNNNLQRDAI AAAIDVLNEE RVIAYPTEAV FGVGCDPDSE TAVMRLLELK 
            60         70         80         90        100
    QRPVDKGLIL IAANYEQLKP YIDDTMLTDV QRETIFSRWP GPVTFVFPAP 
           110        120        130        140        150
    ATTPRWLTGR FDSLAVRVTD HPLVVALCQA YGKPLVSTSA NLSGLPPCRT 
           160        170        180        190
    VDEVRAQFGA AFPVVPGETG GRLNPSEIRD ALTGELFRQG
    Length:190
    Mass (Da):20,768
    Last modified:July 15, 1998 - v2
    <p>The checksum is a form of redundancy check that is calculated from the sequence. It is useful for tracking sequence updates.</p> <p>It should be noted that while, in theory, two different sequences could have the same checksum value, the likelihood that this would happen is extremely low.</p> <p>However UniProtKB may contain entries with identical sequences in case of multiple genes (paralogs).</p> <p>The checksum is computed as the sequence 64-bit Cyclic Redundancy Check value (CRC64) using the generator polynomial: x<sup>64</sup> + x<sup>4</sup> + x<sup>3</sup> + x + 1. The algorithm is described in the ISO 3309 standard. </p> <p class="publication">Press W.H., Flannery B.P., Teukolsky S.A. and Vetterling W.T.<br /> <strong>Cyclic redundancy and other checksums</strong><br /> <a href="http://www.nrbook.com/b/bookcpdf.php">Numerical recipes in C 2nd ed., pp896-902, Cambridge University Press (1993)</a>)</p> Checksum:i4DCAAA8873FAB56F
    GO

    <p>This subsection of the ‘Sequence’ section reports difference(s) between the protein sequence shown in the UniProtKB entry and other available protein sequences derived from the same gene.<p><a href='/help/sequence_caution' target='_top'>More...</a></p>Sequence cautioni

    The sequence AAA58079 differs from that shown. Reason: Frameshift at position 19.Curated

    Sequence databases

    Select the link destinations:

    EMBL nucleotide sequence database

    More...    EMBLi

    GenBank nucleotide sequence database

    More...    GenBanki

    DNA Data Bank of Japan; a nucleotide sequence database

    More...    DDBJi
    Links Updated
    		U18997 Genomic DNA Translation: AAA58079.1 Frameshift.
    U00096 Genomic DNA Translation: AAC76307.1
    AP009048 Genomic DNA Translation: BAE78009.1

    Protein sequence database of the Protein Information Resource

    More...    PIRi    		E65120

    NCBI Reference Sequences

    More...    RefSeqi    		NP_417741.1, NC_000913.3
    WP_001301412.1, NZ_LN832404.1

    Genome annotation databases

    Ensembl bacterial and archaeal genome annotation project

    More...    EnsemblBacteriai    		AAC76307; AAC76307; b3282
    BAE78009; BAE78009; BAE78009

    Database of genes from NCBI RefSeq genomes

    More...    GeneIDi    		947783

    KEGG: Kyoto Encyclopedia of Genes and Genomes

    More...    KEGGi    		ecj:JW3243
    eco:b3282

    Pathosystems Resource Integration Center (PATRIC)

    More...    PATRICi    		fig|1411691.4.peg.3449

    <p>This section provides links to proteins that are similar to the protein sequence(s) described in this entry at different levels of sequence identity thresholds (100%, 90% and 50%) based on their membership in UniProt Reference Clusters (<a href="http://www.uniprot.org/help/uniref">UniRef</a>).<p><a href='/help/similar_proteins_section' target='_top'>More...</a></p>Similar proteinsi

    <p>This section is used to point to information related to entries and found in data collections other than UniProtKB.<p><a href='/help/cross_references_section' target='_top'>More...</a></p>Cross-referencesi

    Sequence databases

    Select the link destinations:
    EMBLi
    GenBanki
    DDBJi
    Links Updated
    		U18997 Genomic DNA Translation: AAA58079.1 Frameshift.
    U00096 Genomic DNA Translation: AAC76307.1
    AP009048 Genomic DNA Translation: BAE78009.1
    PIRiE65120
    RefSeqiNP_417741.1, NC_000913.3
    WP_001301412.1, NZ_LN832404.1

    3D structure databases

    Select the link destinations:

    Protein Data Bank Europe

    More...    PDBei

    Protein Data Bank RCSB

    More...    RCSB PDBi

    Protein Data Bank Japan

    More...    PDBji
    Links Updated
    		PDB entryMethodResolution (Å)ChainPositionsPDBsum
    1HRUX-ray2.00A/B1-188[»]
    2MX1NMR-A2-190[»]
    SMRiP45748
    ModBaseiSearch...
    MobiDBiSearch...

    Protein-protein interaction databases

    BioGridi4262454, 224 interactors
    DIPiDIP-12916N
    IntActiP45748, 12 interactors
    STRINGi511145.b3282

    Proteomic databases

    jPOSTiP45748
    PaxDbiP45748
    PRIDEiP45748

    Protocols and materials databases

    Structural Biology KnowledgebaseSearch...

    Genome annotation databases

    EnsemblBacteriaiAAC76307; AAC76307; b3282
    BAE78009; BAE78009; BAE78009
    GeneIDi947783
    KEGGiecj:JW3243
    eco:b3282
    PATRICifig|1411691.4.peg.3449

    Organism-specific databases

    EchoBASE - an integrated post-genomic database for E. coli

    More...    EchoBASEi    		EB2689
    EcoGeneiEG12840 tsaC

    Phylogenomic databases

    eggNOGiENOG4105EK0 Bacteria
    COG0009 LUCA
    HOGENOMiHOG000076163
    InParanoidiP45748
    KOiK07566
    PhylomeDBiP45748

    Enzyme and pathway databases

    BioCyciEcoCyc:G7698-MONOMER
    ECOL316407:JW3243-MONOMER
    MetaCyc:G7698-MONOMER
    BRENDAi2.7.7.87 2026

    Miscellaneous databases

    EvolutionaryTraceiP45748

    Protein Ontology

    More...    PROi    		PR:P45748

    Family and domain databases

    HAMAPiMF_01852 TsaC, 1 hit
    InterProiView protein in InterPro
    IPR017945 DHBP_synth_RibB-like_a/b_dom
    IPR023535 TC-AMP_synthase
    IPR006070 YrdC-like_dom
    PANTHERiPTHR17490:SF8 PTHR17490:SF8, 1 hit
    PfamiView protein in Pfam
    PF01300 Sua5_yciO_yrdC, 1 hit
    SUPFAMiSSF55821 SSF55821, 1 hit
    PROSITEiView protein in PROSITE
    PS51163 YRDC, 1 hit

    ProtoNet; Automatic hierarchical classification of proteins

    More...    ProtoNeti    		Search...

    <p>This section provides general information on the entry.<p><a href='/help/entry_information_section' target='_top'>More...</a></p>Entry informationi

    <p>This subsection of the ‘Entry information’ section provides a mnemonic identifier for a UniProtKB entry, but it is not a stable identifier. Each reviewed entry is assigned a unique entry name upon integration into UniProtKB/Swiss-Prot.<p><a href='/help/entry_name' target='_top'>More...</a></p>Entry nameiTSAC_ECOLI
    <p>This subsection of the ‘Entry information’ section provides one or more accession number(s). These are stable identifiers and should be used to cite UniProtKB entries. Upon integration into UniProtKB, each entry is assigned a unique accession number, which is called ‘Primary (citable) accession number’.<p><a href='/help/accession_numbers' target='_top'>More...</a></p>AccessioniPrimary (citable) accession number: P45748
    Secondary accession number(s): Q2M6U7
    <p>This subsection of the ‘Entry information’ section shows the date of integration of the entry into UniProtKB, the date of the last sequence update and the date of the last annotation modification (‘Last modified’). The version number for both the entry and the <a href="http://www.uniprot.org/help/canonical_and_isoforms">canonical sequence</a> are also displayed.<p><a href='/help/entry_history' target='_top'>More...</a></p>Entry historyiIntegrated into UniProtKB/Swiss-Prot: November 1, 1995
    Last sequence update: July 15, 1998
    Last modified: June 5, 2019
    This is version 145 of the entry and version 2 of the sequence. See complete history.
    <p>This subsection of the ‘Entry information’ section indicates whether the entry has been manually annotated and reviewed by UniProtKB curators or not, in other words, if the entry belongs to the Swiss-Prot section of UniProtKB (<strong>reviewed</strong>) or to the computer-annotated TrEMBL section (<strong>unreviewed</strong>).<p><a href='/help/entry_status' target='_top'>More...</a></p>Entry statusiReviewed (UniProtKB/Swiss-Prot)
    Annotation programProkaryotic Protein Annotation Program

    <p>This section contains any relevant information that doesn’t fit in any other defined sections<p><a href='/help/miscellaneous_section' target='_top'>More...</a></p>Miscellaneousi

    Keywords - Technical termi

    3D-structure, Complete proteome, Reference proteome

    Documents

    1. PDB cross-references
      Index of Protein Data Bank (PDB) cross-references
    2. SIMILARITY comments
      Index of protein domains and families
    3. Escherichia coli
      Escherichia coli (strain K12): entries and cross-references to EcoGene
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