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Entry version 35 (07 Apr 2021)
Sequence version 1 (21 Mar 2006)
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Protein

7-methylxanthine methyltransferase ICS1

Gene

ICS1

Organism
Camellia irrawadiensis (Burmese tea)
Status
Reviewed-Annotation score:

Annotation score:4 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

Involved in the biosynthesis of caffeine (PubMed:16333668).

Catalyzes the conversion of 7-methylxanthine (7mX) to theobromine, to some extent, able to convert paraxanthine to caffeine and, slightly, mediates the conversion of theobromine to caffeine (PubMed:16333668).

1 Publication

<p>This subsection of the <a href="http://www.uniprot.org/help/function%5Fsection">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 provides information relevant to cofactors. A cofactor is any non-protein substance required for a protein to be catalytically active. Some cofactors are inorganic, such as the metal atoms zinc, iron, and copper in various oxidation states. Others, such as most vitamins, are organic.<p><a href='/help/cofactor' target='_top'>More...</a></p>Cofactori

Mg2+By similarityNote: Binds 1 Mg2+ ion per subunit.By similarity

<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

  1. KM=51 µM for 7-methylxanthine (in the presence of 50 µM S-adenosyl-L-methionine)1 Publication

    pH dependencei

    Optimum pH is 8.0-8.5.1 Publication

    <p>This subsection of the <a href="http://www.uniprot.org/help/function%5Fsection">'Function'</a> section describes the metabolic pathway(s) associated with a protein.<p><a href='/help/pathway' target='_top'>More...</a></p>Pathwayi: Alkaloid biosynthesis

    This protein is involved in Alkaloid biosynthesis.1 Publication
    View all proteins of this organism that are known to be involved in Alkaloid biosynthesis.

    Sites

    Feature keyPosition(s)DescriptionActionsGraphical viewLength
    <p>This subsection of the <a href="http://www.uniprot.org/help/function%5Fsection">Function</a> section describes the interaction between a single amino acid and another chemical entity. Priority is given to the annotation of physiological ligands.<p><a href='/help/binding' target='_top'>More...</a></p>Binding sitei19S-adenosyl-L-methionineBy similarity1
    Binding sitei19SubstrateBy similarity1
    Binding sitei61S-adenosyl-L-methionine; via carbonyl oxygenBy similarity1
    Binding sitei62S-adenosyl-L-methionine; via carbonyl oxygenBy similarity1
    Binding sitei67S-adenosyl-L-methionineBy similarity1
    <p>This subsection describes interesting single amino acid sites on the sequence that are not defined in any other subsection. This subsection can be displayed in different sections ('Function', 'PTM / Processing', 'Pathology and Biotech') according to its content.<p><a href='/help/site' target='_top'>More...</a></p>Sitei149Involved in substrate discriminationBy similarity1
    <p>This subsection of the <a href="http://www.uniprot.org/help/function%5Fsection">Function</a> section indicates at which position the protein binds a given metal ion. The nature of the metal is indicated in the 'Description' field.<p><a href='/help/metal' target='_top'>More...</a></p>Metal bindingi173Magnesium; via carbonyl oxygenBy similarity1
    Sitei221Involved in substrate discriminationBy similarity1
    Metal bindingi259Magnesium; via carbonyl oxygenBy similarity1
    Metal bindingi261Magnesium; via carbonyl oxygenBy similarity1
    Metal bindingi262MagnesiumBy similarity1
    Sitei265Involved in substrate discriminationBy similarity1
    Sitei313Involved in substrate discriminationBy similarity1
    Sitei328Involved in substrate discriminationBy similarity1

    <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

    GO - Biological processi

    <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 functionMethyltransferase, Transferase
    LigandMagnesium, Metal-binding

    Enzyme and pathway databases

    BRENDA Comprehensive Enzyme Information System

    More...
    BRENDAi
    2.1.1.160, 8604

    <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%5Fand%5Ftaxonomy%5Fsection">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:
    7-methylxanthine methyltransferase ICS11 Publication (EC:2.1.1.1591 Publication)
    Short name:
    TCS1b1 Publication
    Alternative name(s):
    Theobromine synthase ICS11 Publication
    <p>This subsection of the <a href="http://www.uniprot.org/help/names%5Fand%5Ftaxonomy%5Fsection">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:ICS11 Publication
    Synonyms:TCS1B1 Publication
    <p>This subsection of the <a href="http://www.uniprot.org/help/names%5Fand%5Ftaxonomy%5Fsection">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>OrganismiCamellia irrawadiensis (Burmese tea)
    <p>This subsection of the <a href="http://www.uniprot.org/help/names%5Fand%5Ftaxonomy%5Fsection">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 identifieri153142 [NCBI]
    <p>This subsection of the <a href="http://www.uniprot.org/help/names%5Fand%5Ftaxonomy%5Fsection">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 lineageiEukaryotaViridiplantaeStreptophytaEmbryophytaTracheophytaSpermatophytaMagnoliopsidaeudicotyledonsGunneridaePentapetalaeasteridsEricalesTheaceaeCamellia

    <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 or proteolytic cleavage.<p><a href='/help/chain' target='_top'>More...</a></p>ChainiPRO_00004517881 – 3657-methylxanthine methyltransferase ICS1Add BLAST365

    <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

    <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

    Region

    Feature keyPosition(s)DescriptionActionsGraphical viewLength
    <p>This subsection of the 'Family and Domains' section describes a region of interest that cannot be described in other subsections.<p><a href='/help/region' target='_top'>More...</a></p>Regioni22 – 26Substrate bindingBy similarity5
    Regioni61 – 62S-adenosyl-L-methionine bindingBy similarity2
    Regioni97 – 100S-adenosyl-L-methionine bindingBy similarity4
    Regioni134 – 136S-adenosyl-L-methionine bindingBy similarity3
    Regioni151 – 153S-adenosyl-L-methionine bindingBy similarity3
    Regioni152 – 156Substrate bindingBy similarity5

    <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

    Family and domain databases

    Gene3D Structural and Functional Annotation of Protein Families

    More...
    Gene3Di
    1.10.1200.270, 1 hit

    Integrated resource of protein families, domains and functional sites

    More...
    InterProi
    View protein in InterPro
    IPR005299, MeTrfase_7
    IPR042086, MeTrfase_capping
    IPR029063, SAM-dependent_MTases

    The PANTHER Classification System

    More...
    PANTHERi
    PTHR31009, PTHR31009, 1 hit

    Pfam protein domain database

    More...
    Pfami
    View protein in Pfam
    PF03492, Methyltransf_7, 1 hit

    Superfamily database of structural and functional annotation

    More...
    SUPFAMi
    SSF53335, SSF53335, 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%5Flength">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%5Fsection">Sequence</a> section indicates if the <a href="http://www.uniprot.org/help/canonical%5Fand%5Fisoforms">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.

    Q2HXL9-1 [UniParc]FASTAAdd to basket
    « Hide
            10         20         30         40         50
    MGKVNEVLFM NRGEGEISYA QNSAFTQKVA SMAMPALENA VETLFSKDFH
    60 70 80 90 100
    LLQALTAADL GCAAGPNTFA VISTIKRMME KKCRELYCQT LELQVYLNDL
    110 120 130 140 150
    FGNDFNTLFK GLSSEVVGNK CEEVSCYVMG VPGSFHGRLF PRNSLHLVHS
    160 170 180 190 200
    SYSVHWLTQA PKGLTSREGL ALNKGKIYIS KTSPPVVKEA YLSQFHEDFT
    210 220 230 240 250
    MFLNARSQEV VPNGCMVLIL HGRQSSDPSE MESCFTWELL AIAIAELVSQ
    260 270 280 290 300
    GLIDEDKLDT FNVPSYWPSL EEVKDIVERD GSFTIDHLEG FELDSLEMQE
    310 320 330 340 350
    NDKWVRGDKF AKMVRAFTEP IISNQFGHEI MDKLYDKFTH ILVSDLEAEL
    360
    PKTTSIILVL SKIVG
    Length:365
    Mass (Da):40,937
    Last modified:March 21, 2006 - v1
    <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:i98434FFC08889215
    GO

    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
    AB056108 mRNA Translation: BAE79729.1

    <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
    AB056108 mRNA Translation: BAE79729.1

    3D structure databases

    Database of comparative protein structure models

    More...
    ModBasei
    Search...

    SWISS-MODEL Interactive Workspace

    More...
    SWISS-MODEL-Workspacei
    Submit a new modelling project...

    Enzyme and pathway databases

    BRENDAi2.1.1.160, 8604

    Family and domain databases

    Gene3Di1.10.1200.270, 1 hit
    InterProiView protein in InterPro
    IPR005299, MeTrfase_7
    IPR042086, MeTrfase_capping
    IPR029063, SAM-dependent_MTases
    PANTHERiPTHR31009, PTHR31009, 1 hit
    PfamiView protein in Pfam
    PF03492, Methyltransf_7, 1 hit
    SUPFAMiSSF53335, SSF53335, 1 hit

    MobiDB: a database of protein disorder and mobility annotations

    More...
    MobiDBi
    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 nameiICS1_CAMIR
    <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: Q2HXL9
    <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%5Fand%5Fisoforms">canonical sequence</a> are also displayed.<p><a href='/help/entry_history' target='_top'>More...</a></p>Entry historyiIntegrated into UniProtKB/Swiss-Prot: February 10, 2021
    Last sequence update: March 21, 2006
    Last modified: April 7, 2021
    This is version 35 of the entry and version 1 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 programPlant 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

    Documents

    1. PATHWAY comments
      Index of metabolic and biosynthesis pathways
    2. SIMILARITY comments
      Index of protein domains and families
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