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Protein

High mobility group protein B2

Gene

HMGB2

Organism
Gallus gallus (Chicken)
Status
Reviewed-Annotation score: Annotation score: 5 out of 5-Experimental evidence at transcript leveli

Functioni

Multifunctional protein with various roles in different cellular compartments. May act in a redox sensitive manner (By similarity). Associates with chromatin and binds DNA with a preference to non-canonical DNA structures such as single-stranded DNA (PubMed:14672558). Can bent DNA and enhance DNA flexibility by looping thus providing a mechanism to promote activities on various gene promoters. Proposed to be involved in the innate immune response to nucleic acids by acting as a cytoplasmic promiscuous immunogenic DNA/RNA sensor. Involved in inflammatory response to antigenic stimulus coupled with proinflammatory activity (By similarity).By similarity1 Publication

Regions

Feature keyPosition(s)DescriptionActionsGraphical viewLength
DNA bindingi9 – 79HMG box 1PROSITE-ProRule annotationAdd BLAST71
DNA bindingi95 – 163HMG box 2PROSITE-ProRule annotationAdd BLAST69

GO - Molecular functioni

  • DNA binding, bending Source: UniProtKB
  • drug binding Source: AgBase
  • four-way junction DNA binding Source: AgBase

GO - Biological processi

Complete GO annotation...

Keywords - Biological processi

DNA recombination, Immunity, Inflammatory response, Innate immunity, Transcription, Transcription regulation

Keywords - Ligandi

DNA-binding

Names & Taxonomyi

Protein namesi
Recommended name:
High mobility group protein B2
Alternative name(s):
High mobility group protein 2
Short name:
HMG-2
Gene namesi
Name:HMGB2
Synonyms:HMG2
OrganismiGallus gallus (Chicken)
Taxonomic identifieri9031 [NCBI]
Taxonomic lineageiEukaryotaMetazoaChordataCraniataVertebrataEuteleostomiArchelosauriaArchosauriaDinosauriaSaurischiaTheropodaCoelurosauriaAvesNeognathaeGalloanseraeGalliformesPhasianidaePhasianinaeGallus
Proteomesi
  • UP000000539 Componenti: Unplaced

Subcellular locationi

GO - Cellular componenti

Complete GO annotation...

Keywords - Cellular componenti

Chromosome, Cytoplasm, Nucleus, Secreted

PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Initiator methionineiRemovedBy similarity
ChainiPRO_00000485382 – 207High mobility group protein B2Add BLAST206

Amino acid modifications

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Disulfide bondi23 ↔ 45In disulfide HMGB2By similarity
Modified residuei23Cysteine derivative; cysteine sulfonic acid (-SO(3)H) in sulfonyl HMGB2; alternateBy similarity1
Modified residuei45Cysteine derivative; cysteine sulfonic acid (-SO(3)H) in sulfonyl HMGB2; alternateBy similarity1
Modified residuei106Cysteine derivative; cysteine sulfonic acid (-SO(3)H) in sulfonyl HMGB2; alternateBy similarity1

Post-translational modificationi

Reduction/oxidation of cysteine residues Cys-23, Cys-45 and Cys-106 and a possible intramolecular disulfide bond involving Cys-23 and Cys-45 give rise to different redox forms with specific functional activities in various cellular compartments: 1- fully reduced HMGB2 (HMGB2C23hC45hC106h), 2- disulfide HMGB2 (HMGB2C23-C45C106h) and 3- sulfonyl HMGB2 (HMGB2C23soC45soC106so).By similarity

Keywords - PTMi

Disulfide bond

Proteomic databases

PaxDbiP26584.
PRIDEiP26584.

Interactioni

Protein-protein interaction databases

BioGridi676729. 1 interactor.
STRINGi9031.ENSGALP00000017462.

Structurei

3D structure databases

ProteinModelPortaliP26584.
ModBaseiSearch...
MobiDBiSearch...

Family & Domainsi

Compositional bias

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Compositional biasi186 – 207Asp/Glu-rich (acidic)Add BLAST22

Sequence similaritiesi

Belongs to the HMGB family.Curated
Contains 2 HMG box DNA-binding domains.PROSITE-ProRule annotation

Keywords - Domaini

Repeat

Phylogenomic databases

eggNOGiKOG0381. Eukaryota.
COG5648. LUCA.
HOGENOMiHOG000197861.
HOVERGENiHBG009000.
InParanoidiP26584.
KOiK11295.
PhylomeDBiP26584.

Family and domain databases

Gene3Di1.10.30.10. 2 hits.
InterProiIPR009071. HMG_box_dom.
IPR017967. HMG_boxA_CS.
IPR031075. HMGB2.
[Graphical view]
PANTHERiPTHR13711:SF217. PTHR13711:SF217. 1 hit.
PfamiPF00505. HMG_box. 1 hit.
PF09011. HMG_box_2. 1 hit.
[Graphical view]
SMARTiSM00398. HMG. 2 hits.
[Graphical view]
SUPFAMiSSF47095. SSF47095. 2 hits.
PROSITEiPS00353. HMG_BOX_1. 1 hit.
PS50118. HMG_BOX_2. 2 hits.
[Graphical view]

Sequencei

Sequence statusi: Complete.

Sequence processingi: The displayed sequence is further processed into a mature form.

P26584-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30         40         50
MGKGDPNKPR GKMSSYAYFV QTCREEHKKK HPDSSVNFAE FSRKCSERWK
60 70 80 90 100
TMSSKEKGKF EEMAKGDKAR YDREMKNYVP PKGEKKGKKK DPNAPKRPPS
110 120 130 140 150
AFFLFCSEHR PKIKNDHPGL SIGDTAKKLG EMWSEQLAKD KQPYEQKAAK
160 170 180 190 200
LKEKYEKDIA AYRAKSKSDA GKKGPGRPAG SKKKAEPEEE EEEEEDEEEE

EEEEDEE
Length:207
Mass (Da):23,828
Last modified:January 23, 2007 - v2
Checksum:i1099C6EF3CC0B7FA
GO

Experimental Info

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Sequence conflicti24 – 25RE → PR in AAA48819 (PubMed:1601311).Curated2
Sequence conflicti137L → S in AAA48819 (PubMed:1601311).Curated1

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
M83235 mRNA. Translation: AAA48818.1.
M80574 mRNA. Translation: AAA48819.1.
PIRiJC1114.
JC1129.
RefSeqiNP_990817.1. NM_205486.1.
UniGeneiGga.4061.

Genome annotation databases

GeneIDi396482.
KEGGigga:396482.

Cross-referencesi

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
M83235 mRNA. Translation: AAA48818.1.
M80574 mRNA. Translation: AAA48819.1.
PIRiJC1114.
JC1129.
RefSeqiNP_990817.1. NM_205486.1.
UniGeneiGga.4061.

3D structure databases

ProteinModelPortaliP26584.
ModBaseiSearch...
MobiDBiSearch...

Protein-protein interaction databases

BioGridi676729. 1 interactor.
STRINGi9031.ENSGALP00000017462.

Proteomic databases

PaxDbiP26584.
PRIDEiP26584.

Protocols and materials databases

Structural Biology KnowledgebaseSearch...

Genome annotation databases

GeneIDi396482.
KEGGigga:396482.

Organism-specific databases

CTDi3148.

Phylogenomic databases

eggNOGiKOG0381. Eukaryota.
COG5648. LUCA.
HOGENOMiHOG000197861.
HOVERGENiHBG009000.
InParanoidiP26584.
KOiK11295.
PhylomeDBiP26584.

Miscellaneous databases

PROiP26584.

Family and domain databases

Gene3Di1.10.30.10. 2 hits.
InterProiIPR009071. HMG_box_dom.
IPR017967. HMG_boxA_CS.
IPR031075. HMGB2.
[Graphical view]
PANTHERiPTHR13711:SF217. PTHR13711:SF217. 1 hit.
PfamiPF00505. HMG_box. 1 hit.
PF09011. HMG_box_2. 1 hit.
[Graphical view]
SMARTiSM00398. HMG. 2 hits.
[Graphical view]
SUPFAMiSSF47095. SSF47095. 2 hits.
PROSITEiPS00353. HMG_BOX_1. 1 hit.
PS50118. HMG_BOX_2. 2 hits.
[Graphical view]
ProtoNetiSearch...

Entry informationi

Entry nameiHMGB2_CHICK
AccessioniPrimary (citable) accession number: P26584
Entry historyi
Integrated into UniProtKB/Swiss-Prot: August 1, 1992
Last sequence update: January 23, 2007
Last modified: October 5, 2016
This is version 108 of the entry and version 2 of the sequence. [Complete history]
Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programChordata Protein Annotation Program

Miscellaneousi

Keywords - Technical termi

Complete proteome, Reference proteome

Documents

  1. SIMILARITY comments
    Index of protein domains and families

Similar proteinsi

Links to similar proteins from the UniProt Reference Clusters (UniRef) at 100%, 90% and 50% sequence identity:
100%UniRef100 combines identical sequences and sub-fragments with 11 or more residues from any organism into one UniRef entry.
90%UniRef90 is built by clustering UniRef100 sequences that have at least 90% sequence identity to, and 80% overlap with, the longest sequence (a.k.a seed sequence).
50%UniRef50 is built by clustering UniRef90 seed sequences that have at least 50% sequence identity to, and 80% overlap with, the longest sequence in the cluster.