UniProtKB - P0DTT0 (BIPA_ECOLI)
Protein
50S ribosomal subunit assembly factor BipA
Gene
bipA
Organism
Escherichia coli (strain K12)
Status
Functioni
A 50S ribosomal subunit assembly protein with GTPase and nucleotide-independent chaperone activity, required for 50S subunit assembly at low temperatures, may also play a role in translation (PubMed:30305394). Genetic and deletion evidence suggests this is involved in ribosome assembly at low temperatures; it may also affect translation (Probable) (PubMed:25777676, PubMed:30305394). Involved in incorporation of ribosomal protein L6 into precursor 44S ribosomal particles at low temperatures. Also has chaperone activity which does not require nucleotides (PubMed:30305394). Binds GDP, ppGpp and GDPCP (a nonhydrolyzable GTP analog) with similar affinity; the conformation of the protein does not significantly change upon nucleotide binding (PubMed:26163516, PubMed:26283392). Interacts with ribosomes (Ref. 12, PubMed:26283392). Binds the 70S ribosome between the 30S and 50S subunits, in a similar position as ribosome-bound EF-G; it contacts a number of ribosomal proteins, both rRNAs and the A-site tRNA. Ribosome binding alters its conformation (PubMed:26283392). Genetically its function does not overlap LepA, and it acts in a different pathway during ribosome assembly than does RNA helicase DeaD (PubMed:25777676). GTPase that affects interactions between enteropathogenic E.coli (EPEC) and epithelial cells (PubMed:9622352). Probably regulates expression of proteins required for (at least) K5 polysaccharide production (Probable). Deletion mutants of bipA are suppressed by an rluC deletion, which no longer modifies uracils 955, 2504 and 2580 to pseudouridine in 23S rRNA; there are 5 other pseudouridine synthases in E.coli, only rluC suppresses this phenotype. Mutating 23S rRNA so the 3 uracils are other nucleotides also suppresses the bipA deletion; pseudouridine-2504 is required for ribosome assembly and translational accuracy (PubMed:18820021, PubMed:25777676).2 Publications7 Publications
Catalytic activityi
Regions
Feature key | Position(s) | DescriptionActions | Graphical view | Length |
---|---|---|---|---|
Nucleotide bindingi | 15 – 20 | GTPUniRule annotationCombined sources2 Publications | 6 | |
Nucleotide bindingi | 128 – 131 | GTPUniRule annotationCombined sources1 Publication | 4 | |
Nucleotide bindingi | 166 – 168 | GTPCombined sources1 Publication | 3 |
GO - Molecular functioni
- GTPase activity Source: InterPro
- GTP binding Source: UniProtKB-KW
- rRNA binding Source: UniProtKB-KW
- tRNA binding Source: UniProtKB-KW
GO - Biological processi
- ribosome biogenesis Source: UniProtKB-KW
Keywordsi
Molecular function | Chaperone, Hydrolase, RNA-binding, rRNA-binding, tRNA-binding |
Biological process | Ribosome biogenesis |
Ligand | GTP-binding, Nucleotide-binding |
Names & Taxonomyi
Protein namesi | Recommended name: 50S ribosomal subunit assembly factor BipA1 PublicationUniRule annotation (EC:3.6.5.-UniRule annotation1 Publication)Alternative name(s): GTP-binding protein BipA/TypA Ribosome assembly factor BipA Ribosome-dependent GTPase BipA Tyrosine phosphorylated protein A |
Gene namesi | Name:bipA1 PublicationUniRule annotation Synonyms:o5911 Publication, typA, yihK Ordered Locus Names:b3871, JW5571 |
Organismi | Escherichia coli (strain K12) |
Taxonomic identifieri | 83333 [NCBI] |
Taxonomic lineagei | Bacteria › Proteobacteria › Gammaproteobacteria › Enterobacterales › Enterobacteriaceae › Escherichia › |
Proteomesi |
|
Subcellular locationi
- Cytoplasm UniRule annotation2 Publications Note: Associates with 70S ribosomes and 30S and 50S subunits in the presence of GMPPNP (a nonhydrolyzable GTP analog) at both 20 and 37 degrees Celsius; no change in ribosome association is seen in the presence of ppGpp or when the stringent response is triggered.1 Publication
GO - Cellular componenti
- cytoplasm Source: UniProtKB-SubCell
Keywords - Cellular componenti
CytoplasmPathology & Biotechi
Disruption phenotypei
Decreased extracellular K5 polysaccharide production at 37 degrees Celsius, increased extracellular K5 polysaccharide production at 20 degrees Celsius (PubMed:10781541). Cold-sensitive growth (20 degrees Celsius); cells have a long lag phase and double more slowly (PubMed:11683274, PubMed:18820021). Decreased capsule synthesis. Cold sensitive growth and decreased capsule synthesis are suppressed by an rluC deletion (PubMed:18820021). Cold-sensitive growth (20 degrees Celsius); a single bipA deletion has a disturbed ribosome profile at low temperature, with more 30S than 50S subunits, accumulation of a precursor-23S rRNA and precursor 50S subunit and decreased 70S ribosomes (PubMed:25777676, PubMed:30305394). These ribosome phenotypes are suppressed in an rluC deletion. A double bipA-deaD deletion has a more severe growth and ribosome phenotype than either single deletion (PubMed:25777676). At 20 degrees Celsius the single deletion is missing ribosomal protein L6 and has decreased amounts of L9 and L18 and makes less capsule. It has decreased motility at both 20 and 37 degrees Celsius (PubMed:30305394). Cold-sensitive growth (18 degrees Celsius); 2-fold more Uup is expressed at 37 degrees Celsius, 10-fold more Uup at 18 degrees Celsius. A double bipA-uup deletion does not grow at 18 degrees Celsius (Ref. 12).6 Publications
Mutagenesis
Feature key | Position(s) | DescriptionActions | Graphical view | Length |
---|---|---|---|---|
Mutagenesisi | 128 | N → D: No GTPase activity, does not restore normal ribosomes to a bipA deletion, does not associate with ribosomes, retains its ability to help proteins refold. 1 Publication | 1 | |
Mutagenesisi | 164 | Y → P: No change in growth at 20 degrees Celsius. 1 Publication | 1 | |
Mutagenesisi | 472 | Y → P: No change in growth at 20 degrees Celsius. 1 Publication | 1 | |
Mutagenesisi | 519 | Y → P: No change in growth at 20 degrees Celsius. 1 Publication | 1 |
PTM / Processingi
Molecule processing
Feature key | Position(s) | DescriptionActions | Graphical view | Length |
---|---|---|---|---|
ChainiPRO_0000091550 | 1 – 607 | 50S ribosomal subunit assembly factor BipAAdd BLAST | 607 |
Post-translational modificationi
Very poorly to not phosphorylated on tyrosine (PubMed:9622352, PubMed:9642082, PubMed:30305394). Phosphorylation in vitro is strongly activated by proteins present in pathogenic strain E2348/69 / EPEC / MAR001 but not non-pathogenic strain K12 / DH5 alpha. Phosphorylation in vitro increases GTPase activity (PubMed:9622352). Mutation of 3 conserved Tyr residues (Tyr-164; Ty5-47 or Tyr-591) to Phe alone or in all combinations has no effect on the ability of the protein to restore growth to a deletion mutant, suggesting Tyr-phosphorylation is not important in non-EPEC strains (PubMed:30305394).3 Publications
Proteomic databases
jPOSTi | P0DTT0 |
PaxDbi | P32132 |
Expressioni
Inductioni
Induced about 2-fold at 18 degrees Celsius (at protein level) (Ref. 12). Basally expressed at 37 degrees Celsius, 3.5-fold induced after shift to 20 degrees Celsius, maximal expression is seen at 2 hours (at protein level). No increase in expression when cells are grown at 43 degrees Celsius or when engineered to produce increased levels of the stress second messenger ppGpp. Expression at low temperatures is activated by CRP (PubMed:30305394).2 Publications
Interactioni
Subunit structurei
Binary interactionsi
Hide detailsP0DTT0
With | #Exp. | IntAct |
---|---|---|
rlmL [P75864] | 3 | EBI-562154,EBI-547718 |
ybeY [P0A898] | 2 | EBI-562154,EBI-560240 |
yigZ [P27862] | 2 | EBI-562154,EBI-561235 |
Protein-protein interaction databases
DIPi | DIP-11058N |
IntActi | P0DTT0, 5 interactors |
STRINGi | 511145.b3871 |
Structurei
Secondary structure
Legend: HelixTurnBeta strandPDB Structure known for this area
Show more details3D structure databases
SMRi | P0DTT0 |
ModBasei | Search... |
PDBe-KBi | Search... |
Family & Domainsi
Domains and Repeats
Feature key | Position(s) | DescriptionActions | Graphical view | Length |
---|---|---|---|---|
Domaini | 3 – 198 | tr-type GUniRule annotationAdd BLAST | 196 |
Region
Feature key | Position(s) | DescriptionActions | Graphical view | Length |
---|---|---|---|---|
Regioni | 1 – 202 | Domain I (or G domain), required for chaperone activity2 Publications1 PublicationAdd BLAST | 202 | |
Regioni | 203 – 320 | Domain II (or beta barrel domain)2 PublicationsAdd BLAST | 118 | |
Regioni | 303 – 385 | Domain III2 PublicationsAdd BLAST | 83 | |
Regioni | 386 – 482 | Domain V2 PublicationsAdd BLAST | 97 | |
Regioni | 483 – 607 | C-terminal domain (CTD), binds A-site tRNA2 PublicationsAdd BLAST | 125 |
Domaini
Crystallizes with 2 superdomains; the first comprises domains I (residues 1-202, also called the G domain) and II (203-302, also called the beta barrel domain), while the second is composed of domains III (303-385), V (386-482) and a BipA-specific C-terminal domain (CTD, 483-607). Domains I-V are homologous to domains in EF-G and LepA; although the domains are similar, their relative arrangement is different (PubMed:26163516, PubMed:26283392). The structure of isolated superdomain 2 is more compact in the presence of Mg2+ than in the intact protein (PubMed:26163516). Upon ribosome binding the second superdomain shifts and the CTD assumes a more compact conformation. The CTD binds to the A-site tRNA (PubMed:26283392). Chaperone activity resides in domain I; truncated proteins of 49-607 and 149-607 have no chaperone activity (PubMed:30305394).3 Publications
Sequence similaritiesi
Belongs to the TRAFAC class translation factor GTPase superfamily. Classic translation factor GTPase family. BipA subfamily.UniRule annotation
Phylogenomic databases
InParanoidi | P32132 |
PhylomeDBi | P32132 |
Family and domain databases
CDDi | cd03710, BipA_TypA_C, 1 hit |
Gene3Di | 2.40.50.250, 1 hit |
HAMAPi | MF_00849, BipA, 1 hit |
InterProi | View protein in InterPro IPR035651, BipA_V IPR035647, EFG_III/V IPR000640, EFG_V-like IPR004161, EFTu-like_2 IPR031157, G_TR_CS IPR027417, P-loop_NTPase IPR005225, Small_GTP-bd_dom IPR000795, TF_GTP-bd_dom IPR009000, Transl_B-barrel_sf IPR042116, TypA/BipA_C IPR006298, TypA_GTP-bd |
PANTHERi | PTHR42908:SF8, PTHR42908:SF8, 1 hit |
Pfami | View protein in Pfam PF00679, EFG_C, 1 hit PF00009, GTP_EFTU, 1 hit PF03144, GTP_EFTU_D2, 1 hit |
PRINTSi | PR00315, ELONGATNFCT |
SUPFAMi | SSF50447, SSF50447, 1 hit SSF52540, SSF52540, 1 hit SSF54980, SSF54980, 2 hits |
TIGRFAMsi | TIGR00231, small_GTP, 1 hit TIGR01394, TypA_BipA, 1 hit |
PROSITEi | View protein in PROSITE PS00301, G_TR_1, 1 hit PS51722, G_TR_2, 1 hit |
i Sequence
Sequence statusi: Complete.
P0DTT0-1 [UniParc]FASTAAdd to basket
10 20 30 40 50
MIEKLRNIAI IAHVDHGKTT LVDKLLQQSG TFDSRAETQE RVMDSNDLEK
60 70 80 90 100
ERGITILAKN TAIKWNDYRI NIVDTPGHAD FGGEVERVMS MVDSVLLVVD
110 120 130 140 150
AFDGPMPQTR FVTKKAFAYG LKPIVVINKV DRPGARPDWV VDQVFDLFVN
160 170 180 190 200
LDATDEQLDF PIVYASALNG IAGLDHEDMA EDMTPLYQAI VDHVPAPDVD
210 220 230 240 250
LDGPFQMQIS QLDYNSYVGV IGIGRIKRGK VKPNQQVTII DSEGKTRNAK
260 270 280 290 300
VGKVLGHLGL ERIETDLAEA GDIVAITGLG ELNISDTVCD TQNVEALPAL
310 320 330 340 350
SVDEPTVSMF FCVNTSPFCG KEGKFVTSRQ ILDRLNKELV HNVALRVEET
360 370 380 390 400
EDADAFRVSG RGELHLSVLI ENMRREGFEL AVSRPKVIFR EIDGRKQEPY
410 420 430 440 450
ENVTLDVEEQ HQGSVMQALG ERKGDLKNMN PDGKGRVRLD YVIPSRGLIG
460 470 480 490 500
FRSEFMTMTS GTGLLYSTFS HYDDVRPGEV GQRQNGVLIS NGQGKAVAFA
510 520 530 540 550
LFGLQDRGKL FLGHGAEVYE GQIIGIHSRS NDLTVNCLTG KKLTNMRASG
560 570 580 590 600
TDEAVVLVPP IRMTLEQALE FIDDDELVEV TPTSIRIRKR HLTENDRRRA
NRAPKDD
Experimental Info
Feature key | Position(s) | DescriptionActions | Graphical view | Length |
---|---|---|---|---|
Sequence conflicti | 592 – 607 | Missing in AAB03005 (PubMed:8346018).CuratedAdd BLAST | 16 |
Sequence databases
Select the link destinations: EMBLi GenBanki DDBJi Links Updated | L19201 Genomic DNA Translation: AAB03005.1 U00096 Genomic DNA Translation: AAT48232.1 AP009048 Genomic DNA Translation: BAE77438.1 |
PIRi | S40816 |
RefSeqi | WP_000570668.1, NZ_STEB01000017.1 YP_026274.1, NC_000913.3 |
Genome annotation databases
GeneIDi | 49586844 948369 |
KEGGi | ecj:JW5571 eco:b3871 |
PATRICi | fig|1411691.4.peg.2840 |
Similar proteinsi
Cross-referencesi
Sequence databases
Select the link destinations: EMBLi GenBanki DDBJi Links Updated | L19201 Genomic DNA Translation: AAB03005.1 U00096 Genomic DNA Translation: AAT48232.1 AP009048 Genomic DNA Translation: BAE77438.1 |
PIRi | S40816 |
RefSeqi | WP_000570668.1, NZ_STEB01000017.1 YP_026274.1, NC_000913.3 |
3D structure databases
Select the link destinations: PDBei RCSB PDBi PDBji Links Updated | PDB entry | Method | Resolution (Å) | Chain | Positions | PDBsum |
4ZCI | X-ray | 2.63 | A/B | 1-601 | [»] | |
4ZCK | X-ray | 2.48 | A | 306-603 | [»] | |
4ZCL | X-ray | 3.06 | A/B | 1-601 | [»] | |
4ZCM | X-ray | 3.31 | A/B | 1-607 | [»] | |
5A9V | X-ray | 3.31 | A/B/C/D/E/F | 1-607 | [»] | |
5A9W | X-ray | 3.70 | A | 1-607 | [»] | |
5A9X | X-ray | 3.80 | A | 1-607 | [»] | |
5A9Y | X-ray | 4.00 | A | 1-607 | [»] | |
5A9Z | electron microscopy | 4.70 | CA | 1-605 | [»] | |
5AA0 | electron microscopy | 5.00 | BZ | 1-605 | [»] | |
SMRi | P0DTT0 | |||||
ModBasei | Search... | |||||
PDBe-KBi | Search... |
Protein-protein interaction databases
DIPi | DIP-11058N |
IntActi | P0DTT0, 5 interactors |
STRINGi | 511145.b3871 |
Proteomic databases
jPOSTi | P0DTT0 |
PaxDbi | P32132 |
Genome annotation databases
GeneIDi | 49586844 948369 |
KEGGi | ecj:JW5571 eco:b3871 |
PATRICi | fig|1411691.4.peg.2840 |
Organism-specific databases
EchoBASEi | EB1783 |
Phylogenomic databases
InParanoidi | P32132 |
PhylomeDBi | P32132 |
Miscellaneous databases
PROi | PR:P32132 |
Family and domain databases
CDDi | cd03710, BipA_TypA_C, 1 hit |
Gene3Di | 2.40.50.250, 1 hit |
HAMAPi | MF_00849, BipA, 1 hit |
InterProi | View protein in InterPro IPR035651, BipA_V IPR035647, EFG_III/V IPR000640, EFG_V-like IPR004161, EFTu-like_2 IPR031157, G_TR_CS IPR027417, P-loop_NTPase IPR005225, Small_GTP-bd_dom IPR000795, TF_GTP-bd_dom IPR009000, Transl_B-barrel_sf IPR042116, TypA/BipA_C IPR006298, TypA_GTP-bd |
PANTHERi | PTHR42908:SF8, PTHR42908:SF8, 1 hit |
Pfami | View protein in Pfam PF00679, EFG_C, 1 hit PF00009, GTP_EFTU, 1 hit PF03144, GTP_EFTU_D2, 1 hit |
PRINTSi | PR00315, ELONGATNFCT |
SUPFAMi | SSF50447, SSF50447, 1 hit SSF52540, SSF52540, 1 hit SSF54980, SSF54980, 2 hits |
TIGRFAMsi | TIGR00231, small_GTP, 1 hit TIGR01394, TypA_BipA, 1 hit |
PROSITEi | View protein in PROSITE PS00301, G_TR_1, 1 hit PS51722, G_TR_2, 1 hit |
ProtoNeti | Search... |
MobiDBi | Search... |
Entry informationi
Entry namei | BIPA_ECOLI | |
Accessioni | P0DTT0Primary (citable) accession number: P0DTT0 Secondary accession number(s): P32132, Q2M8G8, Q6BEY2 | |
Entry historyi | Integrated into UniProtKB/Swiss-Prot: | February 26, 2020 |
Last sequence update: | February 26, 2020 | |
Last modified: | December 2, 2020 | |
This is version 6 of the entry and version 1 of the sequence. See complete history. | ||
Entry statusi | Reviewed (UniProtKB/Swiss-Prot) | |
Annotation program | Prokaryotic Protein Annotation Program |
Miscellaneousi
Keywords - Technical termi
3D-structure, Direct protein sequencing, Reference proteomeDocuments
- PDB cross-references
Index of Protein Data Bank (PDB) cross-references - SIMILARITY comments
Index of protein domains and families