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Entry version 154 (02 Jun 2021)
Sequence version 1 (01 Aug 1998)
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Protein

Squalene epoxidase 4

Gene

SQE4

Organism
Arabidopsis thaliana (Mouse-ear cress)
Status
Reviewed-Annotation score:

Annotation score:3 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

Catalyzes the stereospecific oxidation of squalene to (S)-2,3-epoxysqualene, and is considered to be a rate-limiting enzyme in steroid biosynthesis.

By similarity

Miscellaneous

SEQ4 or SEQ5 are unable to complement seq1 mutants.1 Publication

<p>This subsection of the <a href="http://www.uniprot.org/help/function_section">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

FADBy similarity

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

This protein is involved in step 2 of the subpathway that synthesizes lanosterol from farnesyl diphosphate. This subpathway is part of the pathway lanosterol biosynthesis, which is itself part of Terpene metabolism.
View all proteins of this organism that are known to be involved in the subpathway that synthesizes lanosterol from farnesyl diphosphate, the pathway lanosterol biosynthesis and in Terpene metabolism.

Sites

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the <a href="http://www.uniprot.org/help/function_section">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 sitei81FADBy similarity1
Binding sitei153FADBy similarity1
Binding sitei169FAD; via amide nitrogen and carbonyl oxygenBy similarity1
Binding sitei335FADBy similarity1
Binding sitei348FAD; via amide nitrogenBy similarity1

Regions

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the <a href="http://www.uniprot.org/help/function_section">Function</a> section describes a region in the protein which binds nucleotide phosphates. It always involves more than one amino acid and includes all residues involved in nucleotide-binding.<p><a href='/help/np_bind' target='_top'>More...</a></p>Nucleotide bindingi53 – 54FADBy similarity2
Nucleotide bindingi73 – 74FADBy similarity2

<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 functionOxidoreductase
LigandFAD, Flavoprotein

Enzyme and pathway databases

BioCyc Collection of Pathway/Genome Databases

More...
BioCyci
ARA:AT5G24140-MONOMER

BRENDA Comprehensive Enzyme Information System

More...
BRENDAi
1.14.14.17, 399

UniPathway: a resource for the exploration and annotation of metabolic pathways

More...
UniPathwayi
UPA00767;UER00752

<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:
Squalene epoxidase 4 (EC:1.14.14.17By similarity)
Short name:
AtSQE4
Alternative name(s):
Squalene monooxygenase 2
Short name:
SE 2
<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:SQE4
Synonyms:SQP2
Ordered Locus Names:At5g24140
ORF Names:MLE8.6
<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 5

Organism-specific databases

Arabidopsis Information Portal

More...
Araporti
AT5G24140

The Arabidopsis Information Resource

More...
TAIRi
locus:2167423, AT5G24140

<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

Topology

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the <a href="http://www.uniprot.org/help/subcellular_location_section">'Subcellular location'</a> section describes the extent of a membrane-spanning region of the protein. It denotes the presence of both alpha-helical transmembrane regions and the membrane spanning regions of beta-barrel transmembrane proteins.<p><a href='/help/transmem' target='_top'>More...</a></p>Transmembranei2 – 22HelicalSequence analysisAdd BLAST21
Transmembranei43 – 63HelicalSequence analysisAdd BLAST21
Transmembranei435 – 455HelicalSequence analysisAdd BLAST21

Keywords - Cellular componenti

Membrane

<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_00002098431 – 516Squalene epoxidase 4Add BLAST516

Proteomic databases

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

More...
PaxDbi
O65403

PRoteomics IDEntifications database

More...
PRIDEi
O65403

ProteomicsDB: a multi-organism proteome resource

More...
ProteomicsDBi
220637

<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 mainly in seedlings and inflorescences.1 Publication

Gene expression databases

ExpressionAtlas, Differential and Baseline Expression

More...
ExpressionAtlasi
O65403, baseline and differential

Genevisible search portal to normalized and curated expression data from Genevestigator

More...
Genevisiblei
O65403, 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.AT5G24140.1

<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
O65403

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

<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 squalene monooxygenase family.Curated

Keywords - Domaini

Transmembrane, Transmembrane helix

Phylogenomic databases

evolutionary genealogy of genes: Non-supervised Orthologous Groups

More...
eggNOGi
KOG1298, Eukaryota

The HOGENOM Database of Homologous Genes from Fully Sequenced Organisms

More...
HOGENOMi
CLU_026390_1_0_1

InParanoid: Eukaryotic Ortholog Groups

More...
InParanoidi
O65403

Database for complete collections of gene phylogenies

More...
PhylomeDBi
O65403

Family and domain databases

Gene3D Structural and Functional Annotation of Protein Families

More...
Gene3Di
3.50.50.60, 1 hit

Integrated resource of protein families, domains and functional sites

More...
InterProi
View protein in InterPro
IPR006076, FAD-dep_OxRdtase
IPR036188, FAD/NAD-bd_sf
IPR013698, Squalene_epoxidase
IPR040125, Squalene_monox

The PANTHER Classification System

More...
PANTHERi
PTHR10835, PTHR10835, 1 hit

Pfam protein domain database

More...
Pfami
View protein in Pfam
PF01266, DAO, 1 hit
PF08491, SE, 1 hit

Superfamily database of structural and functional annotation

More...
SUPFAMi
SSF51905, SSF51905, 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>Sequence (1+)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.

This entry has 1 described isoform and 1 potential isoform that is computationally mapped.Show allAlign All

O65403-1 [UniParc]FASTAAdd to basket
« Hide
        10         20         30         40         50
MTYAWLWTLL AFVLTWMVFH LIKMKKAATG DLEAEAEARR DGATDVIIVG
60 70 80 90 100
AGVAGASLAY ALAKDGRRVH VIERDLKEPQ RFMGELMQAG GRFMLAQLGL
110 120 130 140 150
EDCLEDIDAQ EAKSLAIYKD GKHATLPFPD DKSFPHEPVG RLLRNGRLVQ
160 170 180 190 200
RLRQKAASLS NVQLEEGTVK SLIEEEGVVK GVTYKNSAGE EITAFAPLTV
210 220 230 240 250
VCDGCYSNLR RSLVDNTEEV LSYMVGYVTK NSRLEDPHSL HLIFSKPLVC
260 270 280 290 300
VIYQITSDEV RCVAEVPADS IPSISNGEMS TFLKKSMAPQ IPETGNLREI
310 320 330 340 350
FLKGIEEGLP EIKSTATKSM SSRLCDKRGV IVLGDAFNMR HPIIASGMMV
360 370 380 390 400
ALSDICILRN LLKPLPNLSN TKKVSDLVKS FYIIRKPMSA TVNTLASIFS
410 420 430 440 450
QVLVATTDEA REGMRQGCFN YLARGDFKTR GLMTILGGMN PHPLTLVLHL
460 470 480 490 500
VAITLTSMGH LLSPFPSPRR FWHSLRILAW ALQMLGAHLV DEGFKEMLIP
510
TNAAAYRRNY IATTTV
Length:516
Mass (Da):57,027
Last modified:August 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:iD6B3BA803FC682A7
GO

<p>In eukaryotic reference proteomes, unreviewed entries that are likely to belong to the same gene are computationally mapped, based on gene identifiers from Ensembl, EnsemblGenomes and model organism databases.<p><a href='/help/gene_centric_isoform_mapping' target='_top'>More...</a></p>Computationally mapped potential isoform sequencesi

There is 1 potential isoform mapped to this entry.BLASTAlignShow allAdd to basket
EntryEntry nameProtein names
Gene namesLengthAnnotation
A0A2H1ZE80A0A2H1ZE80_ARATH
Squalene monooxygenase
SQP2 MLE8.6, MLE8_6, squalene monooxygenase 2, At5g24140
518Annotation score:

Annotation score:3 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>

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
AJ005929 mRNA Translation: CAA06771.1
AB010696, AB016883 Genomic DNA Translation: BAB11574.1
CP002688 Genomic DNA No translation available.

Protein sequence database of the Protein Information Resource

More...
PIRi
T51364

Genome annotation databases

Ensembl plant genome annotation project

More...
EnsemblPlantsi
AT5G24140.1; AT5G24140.1; AT5G24140

Gramene; a comparative resource for plants

More...
Gramenei
AT5G24140.1; AT5G24140.1; AT5G24140

<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
AJ005929 mRNA Translation: CAA06771.1
AB010696, AB016883 Genomic DNA Translation: BAB11574.1
CP002688 Genomic DNA No translation available.
PIRiT51364

3D structure databases

SMRiO65403
ModBaseiSearch...

Protein-protein interaction databases

STRINGi3702.AT5G24140.1

Proteomic databases

PaxDbiO65403
PRIDEiO65403
ProteomicsDBi220637

Genome annotation databases

EnsemblPlantsiAT5G24140.1; AT5G24140.1; AT5G24140
GrameneiAT5G24140.1; AT5G24140.1; AT5G24140

Organism-specific databases

AraportiAT5G24140
TAIRilocus:2167423, AT5G24140

Phylogenomic databases

eggNOGiKOG1298, Eukaryota
HOGENOMiCLU_026390_1_0_1
InParanoidiO65403
PhylomeDBiO65403

Enzyme and pathway databases

UniPathwayiUPA00767;UER00752
BioCyciARA:AT5G24140-MONOMER
BRENDAi1.14.14.17, 399

Miscellaneous databases

Protein Ontology

More...
PROi
PR:O65403

Gene expression databases

ExpressionAtlasiO65403, baseline and differential
GenevisibleiO65403, AT

Family and domain databases

Gene3Di3.50.50.60, 1 hit
InterProiView protein in InterPro
IPR006076, FAD-dep_OxRdtase
IPR036188, FAD/NAD-bd_sf
IPR013698, Squalene_epoxidase
IPR040125, Squalene_monox
PANTHERiPTHR10835, PTHR10835, 1 hit
PfamiView protein in Pfam
PF01266, DAO, 1 hit
PF08491, SE, 1 hit
SUPFAMiSSF51905, SSF51905, 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 nameiERG13_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: O65403
<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: May 30, 2000
Last sequence update: August 1, 1998
Last modified: June 2, 2021
This is version 154 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. PATHWAY comments
    Index of metabolic and biosynthesis pathways
  3. SIMILARITY comments
    Index of protein domains and families
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