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Entry version 130 (02 Jun 2021)
Sequence version 1 (01 Nov 1998)
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Protein

Protein SPOROCYTELESS

Gene

SPL

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

Transcriptional regulator of sporocyte development (PubMed:10465788).

Acts as an adapter-like transcriptional repressor recruiting TPL/TPR corepressors to inhibit TCP transcription factors (PubMed:25378179).

Required for nucellus and embryo sac development (PubMed:10500234).

Plays a central role in patterning both the proximal-distal and the adaxial-abaxial axes during ovule development (PubMed:12183381).

Involved in establishing the prospective chalaza of the ovule and in controlling the cell number and the length of the funiculus, and is required for the development of the integuments (PubMed:10976054).

Required, with BEL1, for cytokinin-induced PIN1 expression in ovules (PubMed:22786869).

Involved in controlling stamen identity (PubMed:19726570).

May also regulate the morphology of lateral organs by repressing auxin production (PubMed:18557819).

8 Publications

<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 functionRepressor
Biological processTranscription, Transcription regulation

<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 SPOROCYTELESS1 Publication
Alternative name(s):
Protein NOZZLE1 Publication
Transcription factor SPL1 Publication
<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:SPL1 Publication
Synonyms:NZZ1 Publication
Ordered Locus Names:At4g27330Imported
ORF Names:F27G19.11Imported
<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

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Araporti
AT4G27330

The Arabidopsis Information Resource

More...
TAIRi
locus:2131729, AT4G27330

<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 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

Complete male and female sterility.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>Mutagenesisi310L → A: Loss of interaction with TPL and loss of repression activity; when associated with A-312 and A-314. 1 Publication1
Mutagenesisi312L → A: Loss of interaction with TPL and loss of repression activity; when associated with A-310 and A-314. 1 Publication1
Mutagenesisi314L → A: Loss of interaction with TPL and loss of repression activity; when associated with A-310 and A-312. 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 or proteolytic cleavage.<p><a href='/help/chain' target='_top'>More...</a></p>ChainiPRO_00004358701 – 314Protein SPOROCYTELESSAdd BLAST314

Proteomic databases

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

More...
PaxDbi
O81836

PRoteomics IDEntifications database

More...
PRIDEi
O81836

ProteomicsDB: a multi-organism proteome resource

More...
ProteomicsDBi
245198

<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 flower buds (PubMed:10465788, PubMed:10500234). Not found in leaves, siliques and stems (PubMed:10465788). Detected in rosette leaves, stem tissue and seedlings (PubMed:10500234).2 Publications

<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

Expressed during microsporogenesis and megasoprogenesis (PubMed:10465788). Expressed during ovule development (PubMed:25378179).2 Publications

<p>This subsection of the 'Expression' section reports the experimentally proven effects of inducers and repressors (usually chemical compounds or environmental factors) on the level of protein (or mRNA) expression (up-regulation, down-regulation, constitutive expression).<p><a href='/help/induction' target='_top'>More...</a></p>Inductioni

Up-regulated by the transcription factor AGAMOUS (PubMed:15254538). Regulated by ATXR3/SDG2 via chromatin methylation (PubMed:21037105). Triggered by TGA9 AND TGA10 in anthers (PubMed:20805327).3 Publications

Gene expression databases

ExpressionAtlas, Differential and Baseline Expression

More...
ExpressionAtlasi
O81836, baseline and differential

<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

Homodimer and heterodimer with SPEARs (PubMed:25527103).

Interacts in vitro with YAB1, YAB3 and YAB4 (PubMed:15299139).

Interacts (via EAR motif) with TPL, TPR1, TPR2, TPR3 and TPR4 (PubMed:25527103, PubMed:25378179).

Interacts with SPEAR1, SPEAR2, SPEAR3, SPEAR4, TCP1, TCP6, TCP8, TCP9, TCP11, TCP15, TCP20, TCP21 and TCP23 (PubMed:25527103).

Interacts with TCP2, TCP3, TCP4, TCP5, TCP10, TCP13, TCP17 and TCP24 (PubMed:25527103, PubMed:25378179).

3 Publications

<p>This subsection of the '<a href="http://www.uniprot.org/help/interaction_section">Interaction</a>' section provides information about binary protein-protein interactions. The data presented in this section are a quality-filtered subset of binary interactions automatically derived from the <a href="https://www.ebi.ac.uk/intact/">IntAct database</a>. It is updated at every <a href="http://www.uniprot.org/help/synchronization">UniProt release</a>.<p><a href='/help/binary_interactions' target='_top'>More...</a></p>Binary interactionsi

Hide details

Protein-protein interaction databases

Protein interaction database and analysis system

More...
IntActi
O81836, 18 interactors

STRING: functional protein association networks

More...
STRINGi
3702.AT4G27330.1

<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

3D structure databases

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

More...
SMRi
O81836

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

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>Regioni1 – 20DisorderedSequence analysisAdd BLAST20
Regioni33 – 62DisorderedSequence analysisAdd BLAST30

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>Motifi62 – 70SPLCurated9
Motifi308 – 314EARCurated7

<p>This subsection of the 'Family and domains' section provides general information on the biological role of a domain. The term 'domain' is intended here in its wide acceptation, it may be a structural domain, a transmembrane region or a functional domain. Several domains are described in this subsection.<p><a href='/help/domain_cc' target='_top'>More...</a></p>Domaini

Contains 1 EAR motif required for the interaction with TPL and TPRs (PubMed:25378179).1 Publication

<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 NOZZLE family.

Phylogenomic databases

evolutionary genealogy of genes: Non-supervised Orthologous Groups

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eggNOGi
ENOG502R7KG, Eukaryota

The HOGENOM Database of Homologous Genes from Fully Sequenced Organisms

More...
HOGENOMi
CLU_881132_0_0_1

InParanoid: Eukaryotic Ortholog Groups

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InParanoidi
O81836

Identification of Orthologs from Complete Genome Data

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OMAi
FGSYMEG

Database of Orthologous Groups

More...
OrthoDBi
1604526at2759

Database for complete collections of gene phylogenies

More...
PhylomeDBi
O81836

Family and domain databases

Integrated resource of protein families, domains and functional sites

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InterProi
View protein in InterPro
IPR014855, NOZZLE
IPR040356, SPEAR

The PANTHER Classification System

More...
PANTHERi
PTHR33388, PTHR33388, 1 hit
PTHR33388:SF20, PTHR33388:SF20, 1 hit

Pfam protein domain database

More...
Pfami
View protein in Pfam
PF08744, NOZZLE, 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.

O81836-1 [UniParc]FASTAAdd to basket
« Hide
        10         20         30         40         50
MATSLFFMST DQNSVGNPND LLRNTRLVVN SSGEIRTETL KSRGRKPGSK
60 70 80 90 100
TGQQKQKKPT LRGMGVAKLE RQRIEEEKKQ LAAATVGDTS SVASISNNAT
110 120 130 140 150
RLPVPVDPGV VLQGFPSSLG SNRIYCGGVG SGQVMIDPVI SPWGFVETSS
160 170 180 190 200
TTHELSSISN PQMFNASSNN RCDTCFKKKR LDGDQNNVVR SNGGGFSKYT
210 220 230 240 250
MIPPPMNGYD QYLLQSDHHQ RSQGFLYDHR IARAASVSAS STTINPYFNE
260 270 280 290 300
ATNHTGPMEE FGSYMEGNPR NGSGGVKEYE FFPGKYGERV SVVAKTSSLV
310
GDCSPNTIDL SLKL
Length:314
Mass (Da):34,078
Last modified:November 1, 1998 - 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:iB0236D910544CEC3
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 ABK28652 differs from that shown. Reason: Erroneous termination. Extended C-terminus.Curated

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 conflicti295K → T in AAD45344 (PubMed:10465788).Curated1
Sequence conflicti295K → T in AAD37775 (PubMed:10500234).Curated1

Sequence databases

Select the link destinations:

EMBL nucleotide sequence database

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EMBLi

GenBank nucleotide sequence database

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GenBanki

DNA Data Bank of Japan; a nucleotide sequence database

More...
DDBJi
Links Updated
AF146794 Genomic DNA Translation: AAD37775.1
AF159255 mRNA Translation: AAD45344.1
AL030978 Genomic DNA Translation: CAA19727.1
AL078467 Genomic DNA No translation available.
AL161566 Genomic DNA Translation: CAB79588.1
CP002687 Genomic DNA Translation: AEE85325.1
DQ446873 mRNA Translation: ABE66094.1
DQ653227 mRNA Translation: ABK28652.1 Sequence problems.
AB493704 mRNA Translation: BAH30542.1

Protein sequence database of the Protein Information Resource

More...
PIRi
T05757

NCBI Reference Sequences

More...
RefSeqi
NP_194463.1, NM_118867.2

Genome annotation databases

Ensembl plant genome annotation project

More...
EnsemblPlantsi
AT4G27330.1; AT4G27330.1; AT4G27330

Database of genes from NCBI RefSeq genomes

More...
GeneIDi
828841

Gramene; a comparative resource for plants

More...
Gramenei
AT4G27330.1; AT4G27330.1; AT4G27330

KEGG: Kyoto Encyclopedia of Genes and Genomes

More...
KEGGi
ath:AT4G27330

<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
AF146794 Genomic DNA Translation: AAD37775.1
AF159255 mRNA Translation: AAD45344.1
AL030978 Genomic DNA Translation: CAA19727.1
AL078467 Genomic DNA No translation available.
AL161566 Genomic DNA Translation: CAB79588.1
CP002687 Genomic DNA Translation: AEE85325.1
DQ446873 mRNA Translation: ABE66094.1
DQ653227 mRNA Translation: ABK28652.1 Sequence problems.
AB493704 mRNA Translation: BAH30542.1
PIRiT05757
RefSeqiNP_194463.1, NM_118867.2

3D structure databases

SMRiO81836
ModBaseiSearch...

Protein-protein interaction databases

IntActiO81836, 18 interactors
STRINGi3702.AT4G27330.1

Proteomic databases

PaxDbiO81836
PRIDEiO81836
ProteomicsDBi245198

Genome annotation databases

EnsemblPlantsiAT4G27330.1; AT4G27330.1; AT4G27330
GeneIDi828841
GrameneiAT4G27330.1; AT4G27330.1; AT4G27330
KEGGiath:AT4G27330

Organism-specific databases

AraportiAT4G27330
TAIRilocus:2131729, AT4G27330

Phylogenomic databases

eggNOGiENOG502R7KG, Eukaryota
HOGENOMiCLU_881132_0_0_1
InParanoidiO81836
OMAiFGSYMEG
OrthoDBi1604526at2759
PhylomeDBiO81836

Miscellaneous databases

Protein Ontology

More...
PROi
PR:O81836

Gene expression databases

ExpressionAtlasiO81836, baseline and differential

Family and domain databases

InterProiView protein in InterPro
IPR014855, NOZZLE
IPR040356, SPEAR
PANTHERiPTHR33388, PTHR33388, 1 hit
PTHR33388:SF20, PTHR33388:SF20, 1 hit
PfamiView protein in Pfam
PF08744, NOZZLE, 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 nameiSPL_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: O81836
Secondary accession number(s): A0MFA1, Q9S7B8
<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: April 13, 2016
Last sequence update: November 1, 1998
Last modified: June 2, 2021
This is version 130 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

Keywords - Technical termi

Reference proteome

Documents

  1. Arabidopsis thaliana
    Arabidopsis thaliana: entries and gene names
  2. SIMILARITY comments
    Index of protein domains and families
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