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Entry version 101 (29 Sep 2021)
Sequence version 2 (22 Sep 2009)
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Protein

Protein OSB2, chloroplastic

Gene

OSB2

Organism
Arabidopsis thaliana (Mouse-ear cress)
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

Binds preferentially single-stranded DNA. Does not bind to RNA.

1 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

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 functionDNA-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_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:
Protein OSB2, chloroplastic
Alternative name(s):
Organellar single-stranded DNA-binding protein 2
Protein FLORAL ABSCISSION ASSOCIATED
Protein PLASTID TRANSCRIPTIONALLY ACTIVE 9
<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:OSB2
Synonyms:FAA, PTAC9
Ordered Locus Names:At4g20010
ORF Names:F18F4.110
<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>OrganismiArabidopsis thaliana (Mouse-ear cress)
<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 identifieri3702 [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 lineageiEukaryotaViridiplantaeStreptophytaEmbryophytaTracheophytaSpermatophytaMagnoliopsidaeudicotyledonsGunneridaePentapetalaerosidsmalvidsBrassicalesBrassicaceaeCamelineaeArabidopsis
<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
  • UP000006548 <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 4

Organism-specific databases

Arabidopsis Information Portal

More...
Araporti
AT4G20010

The Arabidopsis Information Resource

More...
TAIRi
locus:2119767, AT4G20010

<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

Chloroplast, Plastid

<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

No visible phenotype.1 Publication

<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 transit peptide.<p><a href='/help/transit' target='_top'>More...</a></p>Transit peptidei1 – 20ChloroplastSequence analysisAdd BLAST20
<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_000038360921 – 371Protein OSB2, chloroplasticAdd BLAST351

Proteomic databases

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

More...
PaxDbi
Q8GXH3

PRoteomics IDEntifications database

More...
PRIDEi
Q8GXH3

ProteomicsDB: a multi-organism proteome resource

More...
ProteomicsDBi
248828 [Q8GXH3-1]

<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 a gene at the mRNA or protein level in cells or in tissues of multicellular organisms. By default, the information is derived from experiments at the mRNA level, unless specified 'at protein level'.<br></br>Examples: <a href="http://www.uniprot.org/uniprot/P92958#expression">P92958</a>, <a href="http://www.uniprot.org/uniprot/Q8TDN4#expression">Q8TDN4</a>, <a href="http://www.uniprot.org/uniprot/O14734#expression">O14734</a><p><a href='/help/tissue_specificity' target='_top'>More...</a></p>Tissue specificityi

Expressed in the floral abscission zone.1 Publication

Gene expression databases

ExpressionAtlas, Differential and Baseline Expression

More...
ExpressionAtlasi
Q8GXH3, baseline and differential

Genevisible search portal to normalized and curated expression data from Genevestigator

More...
Genevisiblei
Q8GXH3, AT

<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

Protein-protein interaction databases

STRING: functional protein association networks

More...
STRINGi
3702.AT4G20010.1

<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

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>Domaini97 – 195SSBPROSITE-ProRule annotationAdd BLAST99

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>Regioni45 – 64DisorderedSequence analysisAdd BLAST20
Regioni237 – 289PDF region 1Add BLAST53
Regioni312 – 360PDF region 2Add BLAST49

Keywords - Domaini

Repeat, Transit peptide

Phylogenomic databases

evolutionary genealogy of genes: Non-supervised Orthologous Groups

More...
eggNOGi
ENOG502QPSC, Eukaryota

The HOGENOM Database of Homologous Genes from Fully Sequenced Organisms

More...
HOGENOMi
CLU_035942_0_0_1

InParanoid: Eukaryotic Ortholog Groups

More...
InParanoidi
Q8GXH3

Identification of Orthologs from Complete Genome Data

More...
OMAi
CFHIVAE

Database of Orthologous Groups

More...
OrthoDBi
1476527at2759

Database for complete collections of gene phylogenies

More...
PhylomeDBi
Q8GXH3

Family and domain databases

Integrated resource of protein families, domains and functional sites

More...
InterProi
View protein in InterPro
IPR012340, NA-bd_OB-fold
IPR000424, Primosome_PriB/ssb
IPR011344, ssDNA-bd

The PANTHER Classification System

More...
PANTHERi
PTHR10302, PTHR10302, 1 hit

Superfamily database of structural and functional annotation

More...
SUPFAMi
SSF50249, SSF50249, 1 hit

PROSITE; a protein domain and family database

More...
PROSITEi
View protein in PROSITE
PS50935, SSB, 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>Sequences (2)i

<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.

<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 in its mature form or if it represents the precursor.<p><a href='/help/sequence_processing' target='_top'>More...</a></p>Sequence processingi: The displayed sequence is further processed into a mature form.

This entry describes 2 <p>This subsection of the 'Sequence' section lists the alternative protein sequences (isoforms) that can be generated from the same gene by a single or by the combination of up to four biological events (alternative promoter usage, alternative splicing, alternative initiation and ribosomal frameshifting). Additionally, this section gives relevant information on each alternative protein isoform.<p><a href='/help/alternative_products' target='_top'>More...</a></p> isoformsi produced by alternative splicing. AlignAdd to basket
Isoform 1 (identifier: Q8GXH3-1) [UniParc]FASTAAdd to basket

This isoform has been chosen as the <div> <p><b>What is the canonical sequence?</b><p><a href='/help/canonical_and_isoforms' target='_top'>More...</a></p>canonicali sequence. All positional information in this entry refers to it. This is also the sequence that appears in the downloadable versions of the entry.

« Hide
        10         20         30         40         50
MSLISKSLAR IECSPFFYPR ASEITTGKRI TSPQIRLYTA AAVGGKTGNG
60 70 80 90 100
ERKQRAKAPA KTPEAVTPVK PLEIASVTAT TENELPRPNE IAYESEVANW
110 120 130 140 150
VNLIGFVDQP VQFEASSDGK FWAGTVISQR SASDSSGFWI PIIFEGDLAK
160 170 180 190 200
TAARYVSKDD QIHVSGKLFI DSPPPNMTYA QANVQVLVQN LNFIQPMSPS
210 220 230 240 250
PSPFMVMSSS EKEESGIKKQ PARAKQDIVI DEASDSWNHL IENPKEWWDH
260 270 280 290 300
RENKVNGLVK PRHPDFKSKD SSFSLWLNKA PNWVLPKLEG LEFDVLVPKA
310 320 330 340 350
RVVKQLKGEE SWKDLVQNPD KWWDNRIDKR NAKAPDFKHK ETGEALWLNE
360 370
SPTWVLPKLP PVKKKQESIV F
Length:371
Mass (Da):41,729
Last modified:September 22, 2009 - 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:i115374D9ED7622AA
GO
Isoform 2 (identifier: Q8GXH3-2) [UniParc]FASTAAdd to basket

The sequence of this isoform differs from the canonical sequence as follows:
     222-223: AR → GI

Show »
Length:371
Mass (Da):41,672
Checksum:iAA356E6E2DA233E9
GO

Experimental Info

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the 'Sequence' section reports difference(s) between the canonical sequence (displayed by default in the entry) and the different sequence submissions merged in the entry. These various submissions may originate from different sequencing projects, different types of experiments, or different biological samples. Sequence conflicts are usually of unknown origin.<p><a href='/help/conflict' target='_top'>More...</a></p>Sequence conflicti97V → A in BAC42861 (PubMed:11910074).Curated1

Alternative sequence

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the 'Sequence' section describes the sequence of naturally occurring alternative protein isoform(s). The changes in the amino acid sequence may be due to alternative splicing, alternative promoter usage, alternative initiation, or ribosomal frameshifting.<p><a href='/help/var_seq' target='_top'>More...</a></p>Alternative sequenceiVSP_038020222 – 223AR → GI in isoform 2. Curated2

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
AL021637 Genomic DNA Translation: CAA16609.1
AL161552 Genomic DNA Translation: CAB79001.1
CP002687 Genomic DNA Translation: AEE84260.1
CP002687 Genomic DNA Translation: AEE84261.1
AK118242 mRNA Translation: BAC42861.1
BT026461 mRNA Translation: ABH04568.1

Protein sequence database of the Protein Information Resource

More...
PIRi
T04885

NCBI Reference Sequences

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RefSeqi
NP_001031674.1, NM_001036597.2 [Q8GXH3-2]
NP_567593.1, NM_118120.5 [Q8GXH3-1]

Genome annotation databases

Ensembl plant genome annotation project

More...
EnsemblPlantsi
AT4G20010.1; AT4G20010.1; AT4G20010 [Q8GXH3-1]
AT4G20010.2; AT4G20010.2; AT4G20010 [Q8GXH3-2]

Database of genes from NCBI RefSeq genomes

More...
GeneIDi
827746

Gramene; a comparative resource for plants

More...
Gramenei
AT4G20010.1; AT4G20010.1; AT4G20010 [Q8GXH3-1]
AT4G20010.2; AT4G20010.2; AT4G20010 [Q8GXH3-2]

KEGG: Kyoto Encyclopedia of Genes and Genomes

More...
KEGGi
ath:AT4G20010

Keywords - Coding sequence diversityi

Alternative splicing

<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
AL021637 Genomic DNA Translation: CAA16609.1
AL161552 Genomic DNA Translation: CAB79001.1
CP002687 Genomic DNA Translation: AEE84260.1
CP002687 Genomic DNA Translation: AEE84261.1
AK118242 mRNA Translation: BAC42861.1
BT026461 mRNA Translation: ABH04568.1
PIRiT04885
RefSeqiNP_001031674.1, NM_001036597.2 [Q8GXH3-2]
NP_567593.1, NM_118120.5 [Q8GXH3-1]

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...

Protein-protein interaction databases

STRINGi3702.AT4G20010.1

Proteomic databases

PaxDbiQ8GXH3
PRIDEiQ8GXH3
ProteomicsDBi248828 [Q8GXH3-1]

Genome annotation databases

EnsemblPlantsiAT4G20010.1; AT4G20010.1; AT4G20010 [Q8GXH3-1]
AT4G20010.2; AT4G20010.2; AT4G20010 [Q8GXH3-2]
GeneIDi827746
GrameneiAT4G20010.1; AT4G20010.1; AT4G20010 [Q8GXH3-1]
AT4G20010.2; AT4G20010.2; AT4G20010 [Q8GXH3-2]
KEGGiath:AT4G20010

Organism-specific databases

AraportiAT4G20010
TAIRilocus:2119767, AT4G20010

Phylogenomic databases

eggNOGiENOG502QPSC, Eukaryota
HOGENOMiCLU_035942_0_0_1
InParanoidiQ8GXH3
OMAiCFHIVAE
OrthoDBi1476527at2759
PhylomeDBiQ8GXH3

Miscellaneous databases

Protein Ontology

More...
PROi
PR:Q8GXH3

Gene expression databases

ExpressionAtlasiQ8GXH3, baseline and differential
GenevisibleiQ8GXH3, AT

Family and domain databases

InterProiView protein in InterPro
IPR012340, NA-bd_OB-fold
IPR000424, Primosome_PriB/ssb
IPR011344, ssDNA-bd
PANTHERiPTHR10302, PTHR10302, 1 hit
SUPFAMiSSF50249, SSF50249, 1 hit
PROSITEiView protein in PROSITE
PS50935, SSB, 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 nameiOSB2_ARATH
<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: Q8GXH3
Secondary accession number(s): O49428, Q2V3G8
<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: September 22, 2009
Last sequence update: September 22, 2009
Last modified: September 29, 2021
This is version 101 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 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

Keywords - Technical termi

Reference proteome

Documents

  1. Arabidopsis thaliana
    Arabidopsis thaliana: entries and gene names
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