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Entry version 106 (02 Dec 2020)
Sequence version 1 (01 Aug 1992)
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Protein

Lupus La protein homolog B

Gene

ssb-b

Organism
Xenopus laevis (African clawed frog)
Status
Reviewed-Annotation score:

Annotation score:2 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 transcript 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

La protein plays a role in the transcription of RNA polymerase III. It is most probably a transcription termination factor. Binds to the 3' termini of virtually all nascent polymerase III transcripts (By similarity).By similarity

Miscellaneous

There are two forms of La, LaA and LaB, in Xenopus.

<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 functionRNA-binding

<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:
Lupus La protein homolog B
Alternative name(s):
La autoantigen homolog B
La ribonucleoprotein B
<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:ssb-b
Synonyms:lab1
<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>OrganismiXenopus laevis (African clawed frog)
<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 identifieri8355 [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 lineageiEukaryotaMetazoaChordataCraniataVertebrataEuteleostomiAmphibiaBatrachiaAnuraPipoideaPipidaeXenopodinaeXenopusXenopus

<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

Keywords - Cellular componenti

Nucleus

<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_00002076041 – 427Lupus La protein homolog BAdd BLAST427

<p>This subsection of the <a href="http://www.uniprot.org/help/ptm%5Fprocessing%5Fsection">PTM/processing</a> section describes post-translational modifications (PTMs). This subsection <strong>complements</strong> the information provided at the sequence level or describes modifications for which <strong>position-specific data is not yet available</strong>.<p><a href='/help/post-translational_modification' target='_top'>More...</a></p>Post-translational modificationi

Phosphorylated.Curated

Keywords - PTMi

Phosphoprotein

<p>This section provides information on the expression of a gene at the mRNA or protein level in cells or in tissues of multicellular organisms.<p><a href='/help/expression_section' target='_top'>More...</a></p>Expressioni

<p>This subsection of the 'Expression' section provides information on the expression of the gene product at various stages of a cell, tissue or organism development. By default, the information is derived from experiments at the mRNA level, unless specified 'at the protein level'.<p><a href='/help/developmental_stage' target='_top'>More...</a></p>Developmental stagei

Barely detectable in stage I/II oocytes, accumulate in stage III/IV oocytes, then exhibit a roughly constant steady state level in mature oocytes, eggs, and early embryos.

<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

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

More...
SMRi
P28049

Database of comparative protein structure models

More...
ModBasei
Search...

<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%5Fand%5Fdomains%5Fsection">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>Domaini6 – 98HTH La-type RNA-bindingPROSITE-ProRule annotationAdd BLAST93
Domaini110 – 202RRMPROSITE-ProRule annotationAdd BLAST93
Domaini226 – 348xRRMPROSITE-ProRule annotationAdd BLAST123

Motif

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the 'Family and Domains' section describes a short (usually not more than 20 amino acids) conserved sequence motif of biological significance.<p><a href='/help/motif' target='_top'>More...</a></p>Motifi315 – 331Nuclear localization signalSequence analysisAdd BLAST17

Family and domain databases

Gene3D Structural and Functional Annotation of Protein Families

More...
Gene3Di
1.10.10.10, 1 hit
3.30.70.330, 2 hits

Integrated resource of protein families, domains and functional sites

More...
InterProi
View protein in InterPro
IPR006630, La_HTH
IPR014886, La_RRM
IPR002344, Lupus_La
IPR012677, Nucleotide-bd_a/b_plait_sf
IPR035979, RBD_domain_sf
IPR000504, RRM_dom
IPR036388, WH-like_DNA-bd_sf
IPR036390, WH_DNA-bd_sf

Pfam protein domain database

More...
Pfami
View protein in Pfam
PF05383, La, 1 hit
PF00076, RRM_1, 1 hit
PF08777, RRM_3, 1 hit

Protein Motif fingerprint database; a protein domain database

More...
PRINTSi
PR00302, LUPUSLA

Simple Modular Architecture Research Tool; a protein domain database

More...
SMARTi
View protein in SMART
SM00715, LA, 1 hit
SM00360, RRM, 2 hits

Superfamily database of structural and functional annotation

More...
SUPFAMi
SSF46785, SSF46785, 1 hit
SSF54928, SSF54928, 2 hits

PROSITE; a protein domain and family database

More...
PROSITEi
View protein in PROSITE
PS50961, HTH_LA, 1 hit
PS50102, RRM, 1 hit
PS51939, XRRM, 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.

P28049-1 [UniParc]FASTAAdd to basket
« Hide
        10         20         30         40         50
MAENGDKEQL DLDTKICEQI EYYFGDHNLP RDKFLKQQVL LDNGWVPLET
60 70 80 90 100
MIKFNRLSKL TTDFNIILQA LKKSKTELLE INEEKCKIRR SPAKPLPELN
110 120 130 140 150
EDYKNSFKHR SVYIKGFPTI TNLDEIKEWL NDKGPIENIQ MRRTLQREFK
160 170 180 190 200
GSVFLVFNTE DGAKKFLEDK NLKYKDNDMI ILSREEYFAK KNEERKLNKS
210 220 230 240 250
EEKAKSKQEK EEAQKQAEDA ERKLMEERVG CLLKFSGDLD NMTSREDLHA
260 270 280 290 300
LFQTHGEIEW IDFSRGAKEG IVLFKMNAKE ALDKAKAANN DNLKLKGKNV
310 320 330 340 350
KWELIEGDAE KEALKKIMEG KQESFNKRKG RDGRKFKGKG RGGKGNDSSP
360 370 380 390 400
RKKIQFQGKK KTFDSSDDED DMEESESPQK VTIKAKETAG PKNGASAAPG
410 420
SPKKRALDDK AEDGPAVKQS KTEVGDQ
Length:427
Mass (Da):48,996
Last modified:August 1, 1992 - 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:i45F3146F8934A355
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
X68818 mRNA Translation: CAA48716.1

Protein sequence database of the Protein Information Resource

More...
PIRi
S33817

<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
X68818 mRNA Translation: CAA48716.1
PIRiS33817

3D structure databases

SMRiP28049
ModBaseiSearch...

Family and domain databases

Gene3Di1.10.10.10, 1 hit
3.30.70.330, 2 hits
InterProiView protein in InterPro
IPR006630, La_HTH
IPR014886, La_RRM
IPR002344, Lupus_La
IPR012677, Nucleotide-bd_a/b_plait_sf
IPR035979, RBD_domain_sf
IPR000504, RRM_dom
IPR036388, WH-like_DNA-bd_sf
IPR036390, WH_DNA-bd_sf
PfamiView protein in Pfam
PF05383, La, 1 hit
PF00076, RRM_1, 1 hit
PF08777, RRM_3, 1 hit
PRINTSiPR00302, LUPUSLA
SMARTiView protein in SMART
SM00715, LA, 1 hit
SM00360, RRM, 2 hits
SUPFAMiSSF46785, SSF46785, 1 hit
SSF54928, SSF54928, 2 hits
PROSITEiView protein in PROSITE
PS50961, HTH_LA, 1 hit
PS50102, RRM, 1 hit
PS51939, XRRM, 1 hit

ProtoNet; Automatic hierarchical classification of proteins

More...
ProtoNeti
Search...

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 nameiLAB_XENLA
<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: P28049
<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: August 1, 1992
Last sequence update: August 1, 1992
Last modified: December 2, 2020
This is version 106 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 programChordata Protein Annotation Program
UniProt is an ELIXIR core data resource
Main funding by: National Institutes of Health

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