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Entry version 153 (02 Jun 2021)
Sequence version 1 (01 May 2000)
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Protein

Protein lethal(2)essential for life

Gene

l(2)efl

Organism
Drosophila melanogaster (Fruit fly)
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

Vital role in embryonic development.

<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 functionDevelopmental protein
Biological processStress response

<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:
Protein lethal(2)essential for life
Alternative name(s):
Protein Efl21
<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:l(2)efl
ORF Names:CG4533
<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>OrganismiDrosophila melanogaster (Fruit fly)
<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 identifieri7227 [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 lineageiEukaryotaMetazoaEcdysozoaArthropodaHexapodaInsectaPterygotaNeopteraEndopterygotaDipteraBrachyceraMuscomorphaEphydroideaDrosophilidaeDrosophilaSophophora
<p>This subsection of the <a href="http://www.uniprot.org/help/names%5Fand%5Ftaxonomy%5Fsection">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
  • UP000000803 <p>A UniProt <a href="http://www.uniprot.org/manual/proteomes%5Fmanual">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 2R

Organism-specific databases

Drosophila genome database

More...
FlyBasei
FBgn0011296, l(2)efl

<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>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_00001259691 – 187Protein lethal(2)essential for lifeAdd BLAST187

Proteomic databases

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

More...
PaxDbi
P82147

PRoteomics IDEntifications database

More...
PRIDEi
P82147

<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

Ubiquitously expressed during embryogenesis with no sign of tissue specificity in expression up to stage 16.

<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 throughout development. Highest expression during larval development.

Gene expression databases

Bgee dataBase for Gene Expression Evolution

More...
Bgeei
FBgn0011296, Expressed in oviduct (Drosophila) and 36 other tissues

ExpressionAtlas, Differential and Baseline Expression

More...
ExpressionAtlasi
P82147, baseline and differential

Genevisible search portal to normalized and curated expression data from Genevestigator

More...
Genevisiblei
P82147, DM

<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

GO - Molecular functioni

Protein-protein interaction databases

The Biological General Repository for Interaction Datasets (BioGRID)

More...
BioGRIDi
63343, 13 interactors

Database of interacting proteins

More...
DIPi
DIP-18793N

Protein interaction database and analysis system

More...
IntActi
P82147, 4 interactors

STRING: functional protein association networks

More...
STRINGi
7227.FBpp0072009

<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
P82147

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>Domaini61 – 170sHSPPROSITE-ProRule annotationAdd BLAST110

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>Regioni151 – 187DisorderedSequence analysisAdd BLAST37

<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 small heat shock protein (HSP20) family.PROSITE-ProRule annotation

Phylogenomic databases

evolutionary genealogy of genes: Non-supervised Orthologous Groups

More...
eggNOGi
KOG3591, Eukaryota

Ensembl GeneTree

More...
GeneTreei
ENSGT00940000166889

The HOGENOM Database of Homologous Genes from Fully Sequenced Organisms

More...
HOGENOMi
CLU_095001_1_0_1

InParanoid: Eukaryotic Ortholog Groups

More...
InParanoidi
P82147

Identification of Orthologs from Complete Genome Data

More...
OMAi
RPSFMRW

Database for complete collections of gene phylogenies

More...
PhylomeDBi
P82147

Family and domain databases

Gene3D Structural and Functional Annotation of Protein Families

More...
Gene3Di
2.60.40.790, 1 hit

Integrated resource of protein families, domains and functional sites

More...
InterProi
View protein in InterPro
IPR002068, A-crystallin/Hsp20_dom
IPR001436, Alpha-crystallin/sHSP_animal
IPR008978, HSP20-like_chaperone

The PANTHER Classification System

More...
PANTHERi
PTHR45640, PTHR45640, 1 hit

Pfam protein domain database

More...
Pfami
View protein in Pfam
PF00011, HSP20, 1 hit

PIRSF; a whole-protein classification database

More...
PIRSFi
PIRSF036514, Sm_HSP_B1, 1 hit

Protein Motif fingerprint database; a protein domain database

More...
PRINTSi
PR00299, ACRYSTALLIN

Superfamily database of structural and functional annotation

More...
SUPFAMi
SSF49764, SSF49764, 1 hit

PROSITE; a protein domain and family database

More...
PROSITEi
View protein in PROSITE
PS01031, SHSP, 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>Sequences (2+)i

<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.

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

This entry has 2 described isoforms and 1 potential isoform that is computationally mapped.Show allAlign All

Isoform Long (identifier: P82147-1) [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
MSVVPLMFRD WWDELDFPMR TSRLLDQHFG QGLKRDDLMS SVWNSRPTVL
60 70 80 90 100
RSGYLRPWHT NSLQKQESGS TLNIDSEKFE VILDVQQFSP SEITVKVADK
110 120 130 140 150
FVIVEGKHEE KQDEHGYVSR QFSRRYQLPS DVNPDTVTSS LSSDGLLTIK
160 170 180
APMKALPPPQ TERLVQITQT GPSSKEDNAK KVETSTA
Length:187
Mass (Da):21,309
Last modified:May 1, 2000 - 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:iFF1742AD4E29EEDB
GO
Isoform Short (identifier: P82147-2) [UniParc]FASTAAdd to basket

The sequence of this isoform differs from the canonical sequence as follows:
     131-145: DVNPDTVTSSLSSDG → ESEFHQQNRKYAKRV
     146-187: Missing.

Show »
Length:145
Mass (Da):17,234
Checksum:iCAA75A4BEDB42992
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
A0A0B4KEY5A0A0B4KEY5_DROME
Lethal (2) essential for life, isof...
l(2)efl CryAB, Cryab, Dmel19.8, Dmel\CG4533, el(2)13-1
187Annotation 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>

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_002420131 – 145DVNPD…LSSDG → ESEFHQQNRKYAKRV in isoform Short. 1 PublicationAdd BLAST15
Alternative sequenceiVSP_002421146 – 187Missing in isoform Short. 1 PublicationAdd BLAST42

Sequence databases

Select the link destinations:

EMBL nucleotide sequence database

More...
EMBLi

GenBank nucleotide sequence database

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GenBanki

DNA Data Bank of Japan; a nucleotide sequence database

More...
DDBJi
Links Updated
AJ250883 Genomic DNA Translation: CAB60198.1
X77635 Genomic DNA Translation: CAB55438.1
AE013599 Genomic DNA Translation: AAF47041.1
AE013599 Genomic DNA Translation: AAM68267.1
AY047516 mRNA Translation: AAK77248.1
BT001462 mRNA Translation: AAN71217.1 Sequence problems.

Protein sequence database of the Protein Information Resource

More...
PIRi
S42032

NCBI Reference Sequences

More...
RefSeqi
NP_001261156.1, NM_001274227.1 [P82147-1]
NP_523827.1, NM_079103.3 [P82147-1]

Genome annotation databases

Ensembl metazoan genome annotation project

More...
EnsemblMetazoai
FBtr0072100; FBpp0072009; FBgn0011296 [P82147-1]
FBtr0336685; FBpp0307666; FBgn0011296 [P82147-1]

Database of genes from NCBI RefSeq genomes

More...
GeneIDi
37744

KEGG: Kyoto Encyclopedia of Genes and Genomes

More...
KEGGi
dme:Dmel_CG4533

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
AJ250883 Genomic DNA Translation: CAB60198.1
X77635 Genomic DNA Translation: CAB55438.1
AE013599 Genomic DNA Translation: AAF47041.1
AE013599 Genomic DNA Translation: AAM68267.1
AY047516 mRNA Translation: AAK77248.1
BT001462 mRNA Translation: AAN71217.1 Sequence problems.
PIRiS42032
RefSeqiNP_001261156.1, NM_001274227.1 [P82147-1]
NP_523827.1, NM_079103.3 [P82147-1]

3D structure databases

SMRiP82147
ModBaseiSearch...

Protein-protein interaction databases

BioGRIDi63343, 13 interactors
DIPiDIP-18793N
IntActiP82147, 4 interactors
STRINGi7227.FBpp0072009

Proteomic databases

PaxDbiP82147
PRIDEiP82147

Protocols and materials databases

The DNASU plasmid repository

More...
DNASUi
37744

Genome annotation databases

EnsemblMetazoaiFBtr0072100; FBpp0072009; FBgn0011296 [P82147-1]
FBtr0336685; FBpp0307666; FBgn0011296 [P82147-1]
GeneIDi37744
KEGGidme:Dmel_CG4533

Organism-specific databases

FlyBaseiFBgn0011296, l(2)efl

Phylogenomic databases

eggNOGiKOG3591, Eukaryota
GeneTreeiENSGT00940000166889
HOGENOMiCLU_095001_1_0_1
InParanoidiP82147
OMAiRPSFMRW
PhylomeDBiP82147

Miscellaneous databases

BioGRID ORCS database of CRISPR phenotype screens

More...
BioGRID-ORCSi
37744, 0 hits in 3 CRISPR screens

Database of phenotypes from RNA interference screens in Drosophila and Homo sapiens

More...
GenomeRNAii
37744

Protein Ontology

More...
PROi
PR:P82147

Gene expression databases

BgeeiFBgn0011296, Expressed in oviduct (Drosophila) and 36 other tissues
ExpressionAtlasiP82147, baseline and differential
GenevisibleiP82147, DM

Family and domain databases

Gene3Di2.60.40.790, 1 hit
InterProiView protein in InterPro
IPR002068, A-crystallin/Hsp20_dom
IPR001436, Alpha-crystallin/sHSP_animal
IPR008978, HSP20-like_chaperone
PANTHERiPTHR45640, PTHR45640, 1 hit
PfamiView protein in Pfam
PF00011, HSP20, 1 hit
PIRSFiPIRSF036514, Sm_HSP_B1, 1 hit
PRINTSiPR00299, ACRYSTALLIN
SUPFAMiSSF49764, SSF49764, 1 hit
PROSITEiView protein in PROSITE
PS01031, SHSP, 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 nameiL2EFL_DROME
<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: P82147
Secondary accession number(s): Q8MLQ9
<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: February 21, 2001
Last sequence update: May 1, 2000
Last modified: June 2, 2021
This is version 153 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 programDrosophila annotation project

<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. Drosophila
    Drosophila: entries, gene names and cross-references to FlyBase
  2. SIMILARITY comments
    Index of protein domains and families
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