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Entry version 101 (07 Oct 2020)
Sequence version 1 (19 Jul 2005)
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Protein

Lon protease

Gene

lon

Organism
Escherichia coli O6:H1 (strain CFT073 / ATCC 700928 / UPEC)
Status
Reviewed-Annotation score:

Annotation score:4 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>
-Protein inferred from homologyi <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

ATP-dependent serine protease that mediates the selective degradation of mutant and abnormal proteins as well as certain short-lived regulatory proteins. Required for cellular homeostasis and for survival from DNA damage and developmental changes induced by stress. Degrades polypeptides processively to yield small peptide fragments that are 5 to 10 amino acids long. Binds to DNA in a double-stranded, site-specific manner. Endogenous substrates include the regulatory proteins RcsA and SulA, the transcriptional activator SoxS, and UmuD. Its overproduction specifically inhibits translation through at least two different pathways, one of them being the YoeB-YefM toxin-antitoxin system.UniRule annotation

<p>This subsection of the <a href="http://www.uniprot.org/help/function%5Fsection">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 <a href="http://www.uniprot.org/help/function%5Fsection">Function</a> section describes regulatory mechanisms for enzymes, transporters or microbial transcription factors, and reports the components which regulate (by activation or inhibition) the reaction.<p><a href='/help/activity_regulation' target='_top'>More...</a></p>Activity regulationi

Contains an allosteric site (distinct from its active site), whose occupancy by an unfolded polypeptide leads to enzyme activation.UniRule annotation

Sites

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the <a href="http://www.uniprot.org/help/function%5Fsection">Function</a> section is used for enzymes and indicates the residues directly involved in catalysis.<p><a href='/help/act_site' target='_top'>More...</a></p>Active sitei679UniRule annotation1
Active sitei722UniRule annotation1

Regions

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the <a href="http://www.uniprot.org/help/function%5Fsection">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 bindingi356 – 363ATPUniRule annotation8

<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 functionHydrolase, Protease, Serine protease
Biological processStress response
LigandATP-binding, Nucleotide-binding

<p>This section provides information about the protein and gene name(s) and synonym(s) and about the organism that is the source of the protein sequence.<p><a href='/help/names_and_taxonomy_section' target='_top'>More...</a></p>Names & Taxonomyi

<p>This subsection of the <a href="http://www.uniprot.org/help/names%5Fand%5Ftaxonomy%5Fsection">Names and taxonomy</a> section provides an exhaustive list of all names of the protein, from commonly used to obsolete, to allow unambiguous identification of a protein.<p><a href='/help/protein_names' target='_top'>More...</a></p>Protein namesi
Recommended name:
Lon proteaseUniRule annotation (EC:3.4.21.53UniRule annotation)
Alternative name(s):
ATP-dependent protease LaUniRule annotation
<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:lonUniRule annotation
Ordered Locus Names:c0555
<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>OrganismiEscherichia coli O6:H1 (strain CFT073 / ATCC 700928 / UPEC)
<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 identifieri199310 [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 lineageiBacteriaProteobacteriaGammaproteobacteriaEnterobacteralesEnterobacteriaceaeEscherichia
<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
  • UP000001410 <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

<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

GO - Cellular componenti

Keywords - Cellular componenti

Cytoplasm

<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 <a href="http://www.uniprot.org/help/ptm%5Fprocessing%5Fsection">PTM / Processing</a> section indicates that the initiator methionine is cleaved from the mature protein.<p><a href='/help/init_met' target='_top'>More...</a></p>Initiator methionineiRemovedUniRule annotation
<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_00000761342 – 784Lon proteaseAdd BLAST783

Proteomic databases

PRoteomics IDEntifications database

More...
PRIDEi
P0A9M1

<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 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

By accumulation of abnormal proteins, such as at high temperatures. Under stress conditions.UniRule annotation

<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%5Fsection">'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%5Fsection">'Function'</a> section).<p><a href='/help/subunit_structure' target='_top'>More...</a></p>Subunit structurei

Homohexamer. Organized in a ring with a central cavity. ATP binding and hydrolysis do not affect the oligomeric state of the enzyme.

UniRule annotation

Protein-protein interaction databases

STRING: functional protein association networks

More...
STRINGi
199310.c0555

<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

Biological Magnetic Resonance Data Bank

More...
BMRBi
P0A9M1

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

More...
SMRi
P0A9M1

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>Domaini11 – 202Lon N-terminalPROSITE-ProRule annotationAdd BLAST192
Domaini592 – 773Lon proteolyticPROSITE-ProRule annotationAdd BLAST182

Compositional bias

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the 'Family and Domains' section describes the position of regions of compositional bias within the protein and the particular amino acids that are over-represented within those regions.<p><a href='/help/compbias' target='_top'>More...</a></p>Compositional biasi211 – 219Arg/Lys-rich (basic)9
Compositional biasi240 – 252Asp/Glu-rich (acidic)Add BLAST13
Compositional biasi255 – 270Arg/Lys-rich (basic)Add BLAST16

<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 peptidase S16 family.UniRule annotation

Phylogenomic databases

evolutionary genealogy of genes: Non-supervised Orthologous Groups

More...
eggNOGi
COG0466, Bacteria

The HOGENOM Database of Homologous Genes from Fully Sequenced Organisms

More...
HOGENOMi
CLU_004109_4_3_6

KEGG Orthology (KO)

More...
KOi
K01338

Identification of Orthologs from Complete Genome Data

More...
OMAi
EYFLHQQ

Family and domain databases

Gene3D Structural and Functional Annotation of Protein Families

More...
Gene3Di
3.30.230.10, 1 hit

HAMAP database of protein families

More...
HAMAPi
MF_01973, lon_bact, 1 hit

Integrated resource of protein families, domains and functional sites

More...
InterProi
View protein in InterPro
IPR003593, AAA+_ATPase
IPR003959, ATPase_AAA_core
IPR027543, Lon_bac
IPR004815, Lon_bac/euk-typ
IPR008269, Lon_proteolytic
IPR027065, Lon_Prtase
IPR003111, Lon_substr-bd
IPR027417, P-loop_NTPase
IPR008268, Peptidase_S16_AS
IPR015947, PUA-like_sf
IPR020568, Ribosomal_S5_D2-typ_fold
IPR014721, Ribosomal_S5_D2-typ_fold_subgr

The PANTHER Classification System

More...
PANTHERi
PTHR10046, PTHR10046, 1 hit

Pfam protein domain database

More...
Pfami
View protein in Pfam
PF00004, AAA, 1 hit
PF05362, Lon_C, 1 hit
PF02190, LON_substr_bdg, 1 hit

PIRSF; a whole-protein classification database

More...
PIRSFi
PIRSF001174, Lon_proteas, 1 hit

Simple Modular Architecture Research Tool; a protein domain database

More...
SMARTi
View protein in SMART
SM00382, AAA, 1 hit
SM00464, LON, 1 hit

Superfamily database of structural and functional annotation

More...
SUPFAMi
SSF52540, SSF52540, 1 hit
SSF54211, SSF54211, 1 hit
SSF88697, SSF88697, 1 hit

TIGRFAMs; a protein family database

More...
TIGRFAMsi
TIGR00763, lon, 1 hit

PROSITE; a protein domain and family database

More...
PROSITEi
View protein in PROSITE
PS51787, LON_N, 1 hit
PS51786, LON_PROTEOLYTIC, 1 hit
PS01046, LON_SER, 1 hit

<p>This section displays by default the canonical protein sequence and upon request all isoforms described in the entry. It also includes information pertinent to the sequence(s), including <a href="http://www.uniprot.org/help/sequence%5Flength">length</a> and <a href="http://www.uniprot.org/help/sequences">molecular weight</a>. The information is filed in different subsections. The current subsections and their content are listed below:<p><a href='/help/sequences_section' target='_top'>More...</a></p>Sequencei

<p>This subsection of the <a href="http://www.uniprot.org/help/sequences%5Fsection">Sequence</a> section indicates if the <a href="http://www.uniprot.org/help/canonical%5Fand%5Fisoforms">canonical sequence</a> displayed by default in the entry is complete or not.<p><a href='/help/sequence_status' target='_top'>More...</a></p>Sequence statusi: Complete.

<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 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.

P0A9M1-1 [UniParc]FASTAAdd to basket
« Hide
        10         20         30         40         50
MNPERSERIE IPVLPLRDVV VYPHMVIPLF VGREKSIRCL EAAMDHDKKI
60 70 80 90 100
MLVAQKEAST DEPGVNDLFT VGTVASILQM LKLPDGTVKV LVEGLQRARI
110 120 130 140 150
SALSDNGEHF SAKAEYLESP TIDEREQEVL VRTAISQFEG YIKLNKKIPP
160 170 180 190 200
EVLTSLNSID DPARLADTIA AHMPLKLADK QSVLEMSDVN ERLEYLMAMM
210 220 230 240 250
ESEIDLLQVE KRIRNRVKKQ MEKSQREYYL NEQMKAIQKE LGEMDDAPDE
260 270 280 290 300
NEALKRKIDA AKMPKEAKEK AEAELQKLKM MSPMSAEATV VRGYIDWMVQ
310 320 330 340 350
VPWNARSKVK KDLRQAQEIL DTDHYGLERV KDRILEYLAV QSRVNKIKGP
360 370 380 390 400
ILCLVGPPGV GKTSLGQSIA KATGRKYVRM ALGGVRDEAE IRGHRRTYIG
410 420 430 440 450
SMPGKLIQKM AKVGVKNPLF LLDEIDKMSS DMRGDPASAL LEVLDPEQNV
460 470 480 490 500
AFSDHYLEVD YDLSDVMFVA TSNSMNIPAP LLDRMEVIRL SGYTEDEKLN
510 520 530 540 550
IAKRHLLPKQ IERNALKKGE LTVDDSAIIG IIRYYTREAG VRGLEREISK
560 570 580 590 600
LCRKAVKQLL LDKSLKHIEI NGDNLHDYLG VQRFDYGRAD NENRVGQVTG
610 620 630 640 650
LAWTEVGGDL LTIETACVPG KGKLTYTGSL GEVMQESIQA ALTVVRARAE
660 670 680 690 700
KLGINPDFYE KRDIHVHVPE GATPKDGPSA GIAMCTALVS CLTGNPVRAD
710 720 730 740 750
VAMTGEITLR GQVLPIGGLK EKLLAAHRGG IKTVLIPFEN KRDLEEIPDN
760 770 780
VIADLDIHPV KRIEEVLTLA LQNEPSGMQV VTAK
Length:784
Mass (Da):87,438
Last modified:July 19, 2005 - 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:i4042499C97694EF8
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 AAN79033 differs from that shown. Reason: Erroneous initiation.Curated

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
AE014075 Genomic DNA Translation: AAN79033.1 Different initiation.

NCBI Reference Sequences

More...
RefSeqi
WP_001295325.1, NC_004431.1

Genome annotation databases

Ensembl bacterial and archaeal genome annotation project

More...
EnsemblBacteriai
AAN79033; AAN79033; c0555

Database of genes from NCBI RefSeq genomes

More...
GeneIDi
52075780

KEGG: Kyoto Encyclopedia of Genes and Genomes

More...
KEGGi
ecc:c0555

<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
AE014075 Genomic DNA Translation: AAN79033.1 Different initiation.
RefSeqiWP_001295325.1, NC_004431.1

3D structure databases

BMRBiP0A9M1
SMRiP0A9M1
ModBaseiSearch...

Protein-protein interaction databases

STRINGi199310.c0555

Proteomic databases

PRIDEiP0A9M1

Genome annotation databases

EnsemblBacteriaiAAN79033; AAN79033; c0555
GeneIDi52075780
KEGGiecc:c0555

Phylogenomic databases

eggNOGiCOG0466, Bacteria
HOGENOMiCLU_004109_4_3_6
KOiK01338
OMAiEYFLHQQ

Family and domain databases

Gene3Di3.30.230.10, 1 hit
HAMAPiMF_01973, lon_bact, 1 hit
InterProiView protein in InterPro
IPR003593, AAA+_ATPase
IPR003959, ATPase_AAA_core
IPR027543, Lon_bac
IPR004815, Lon_bac/euk-typ
IPR008269, Lon_proteolytic
IPR027065, Lon_Prtase
IPR003111, Lon_substr-bd
IPR027417, P-loop_NTPase
IPR008268, Peptidase_S16_AS
IPR015947, PUA-like_sf
IPR020568, Ribosomal_S5_D2-typ_fold
IPR014721, Ribosomal_S5_D2-typ_fold_subgr
PANTHERiPTHR10046, PTHR10046, 1 hit
PfamiView protein in Pfam
PF00004, AAA, 1 hit
PF05362, Lon_C, 1 hit
PF02190, LON_substr_bdg, 1 hit
PIRSFiPIRSF001174, Lon_proteas, 1 hit
SMARTiView protein in SMART
SM00382, AAA, 1 hit
SM00464, LON, 1 hit
SUPFAMiSSF52540, SSF52540, 1 hit
SSF54211, SSF54211, 1 hit
SSF88697, SSF88697, 1 hit
TIGRFAMsiTIGR00763, lon, 1 hit
PROSITEiView protein in PROSITE
PS51787, LON_N, 1 hit
PS51786, LON_PROTEOLYTIC, 1 hit
PS01046, LON_SER, 1 hit

ProtoNet; Automatic hierarchical classification of proteins

More...
ProtoNeti
Search...

MobiDB: a database of protein disorder and mobility annotations

More...
MobiDBi
Search...

<p>This section provides general information on the entry.<p><a href='/help/entry_information_section' target='_top'>More...</a></p>Entry informationi

<p>This subsection of the 'Entry information' section provides a mnemonic identifier for a UniProtKB entry, but it is not a stable identifier. Each reviewed entry is assigned a unique entry name upon integration into UniProtKB/Swiss-Prot.<p><a href='/help/entry_name' target='_top'>More...</a></p>Entry nameiLON_ECOL6
<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: P0A9M1
Secondary accession number(s): P08177, P78219
<p>This subsection of the 'Entry information' section shows the date of integration of the entry into UniProtKB, the date of the last sequence update and the date of the last annotation modification ('Last modified'). The version number for both the entry and the <a href="http://www.uniprot.org/help/canonical%5Fand%5Fisoforms">canonical sequence</a> are also displayed.<p><a href='/help/entry_history' target='_top'>More...</a></p>Entry historyiIntegrated into UniProtKB/Swiss-Prot: August 1, 1988
Last sequence update: July 19, 2005
Last modified: October 7, 2020
This is version 101 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 programProkaryotic 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

Documents

  1. Peptidase families
    Classification of peptidase families and list of entries
  2. SIMILARITY comments
    Index of protein domains and families
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