Phenylalanine--tRNA ligase beta subunit

<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

<p>This subsection of the ‘Function’ section describes the catalytic activity of an enzyme, i.e. the chemical reaction it catalyzes. This information usually correlates with the presence of an EC (Enzyme Commission) number in the ‘Names and taxonomy’ section.<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

Sites

<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

• ATP binding Source: UniProtKB-KW
• magnesium ion binding Source: InterPro
• phenylalanine-tRNA ligase activity Source: UniProtKB-EC
• tRNA binding Source: UniProtKB-KW

<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 - Biological processⁱ

• phenylalanyl-tRNA aminoacylation Source: InterPro

<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

<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 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

<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 - Cellular componentⁱ

• cytoplasm Source: UniProtKB-SubCell

<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>Keywords - Cellular componentⁱ

<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

<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

Protein-protein interaction databases

<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

3D structure databases

<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

<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

Phylogenomic databases

Family and domain databases

<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 length and molecular weight.<p><a href='/help/sequences_section' target='_top'>More...</a></p>Sequenceⁱ

<p>This subsection of the ‘Sequence’ 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.

        10         20         30         40         50
MRISVNWLQS LVELNLSPEE LGELLTIAGL EVEEIEDRRS WAAGVVLGRV 
        60         70         80         90        100
ISREKHPNAD KLSVCVVDIG TEEPSTIVCG AANVRADILV PVATLGSYLP 
       110        120        130        140        150
KVDLKIKPAK LRGVKSSGMI CSLAELGLSK ESEGIHIFPD LDLPSGSPVG 
       160        170        180        190        200
PLLGLDDVIL EISPTANRAD ALSMVGVARE VAALTGGKLS LPEIKAVSVS 
       210        220        230        240        250
DQDLPISVTE PQACPTYVGT VIRGVKVGPS PDWLQQRLLA AGTRPINNVV 
       260        270        280        290        300
DVTNYVLLEW GQPLHSFDQD KLQTLVGPEG FALGVRFAEE GEKLITLDDQ 
       310        320        330        340        350
ERTLQPQNLL VTANDQPVAI AGVMGGAATE VDENTQNIVL ETALFDGVTI 
       360        370        380        390        400
RKSSKAINLR SESSTRYERG VNRCELEVAL HRAIALMTEL AGGTVVRQGK 
       410        420        430        440        450
ADQRQDRGEA IINLRLERLQ QLLGKVNTPT GIGNITAEDV ERILTDLGCG 
       460        470        480        490        500
LTRQSDSDTP VWAVTVPSYR QRDIEREIDL IEEVARLYGY DHFCEQLPSN 
       510        520        530        540        550
TIAGGLSPSY QAELALREAC RGVGLTEVVH YSLVKPHGSE VMLANPLFAE 
       560        570        580        590        600
YSALRTNLLD GLITAFANNQ AQNNGALNAF EVGRVFWQNE GDIGEADHLA 
       610        620        630        640        650
GICGGSQITE GTWPQGGKPQ PMSWYDAKGL LEAIFQRLGA TVTYSGDHQD 
       660        670        680        690        700
PRLHPGRTAL LSCNGTVLGR FGQLHPQLRR EKGLIDEVYA FEITLTPLYQ 
       710        720        730        740        750
AMETQILGTP DFRPYSPYPA VARDLALYAP LELTVAELTQ AMVKAGGDLL 
       760        770        780        790        800
EQVELFDEYR GQSVPAGQRS LAFSLAYRVG DRTLTDADVE PLHNQIREAL 
       810
TKQFAVSLRS                                             

Sequence databases

Genome annotation databases

<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

3D structure databases

Protein-protein interaction databases

Protocols and materials databases

Genome annotation databases

Phylogenomic databases

Family and domain databases

<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 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

<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>Keywords - Technical termⁱ

Documents

1. Aminoacyl-tRNA synthetases
   List of aminoacyl-tRNA synthetase entries
2. SIMILARITY comments
   Index of protein domains and families
3. Synechocystis PCC 6803
   Synechocystis (strain PCC 6803): entries and gene names

<p>This section provides links to the UniProt Reference Clusters (<a href="http://www.uniprot.org/help/uniref">UniRef</a>). UniRef consists of clusters for UniProtKB sequences (including isoforms) and selected UniParc sequences, in order to obtain complete coverage of the sequence space at resolutions of 100%, 90% and 50% identity.<p><a href='/help/similar_proteins_section' target='_top'>More...</a></p>Similar proteinsⁱ