View source for 8ir3


==human nuclear pre-60S ribosomal particle - State B'==
<StructureSection load='8ir3' size='340' side='right'caption='[[8ir3]], [[Resolution|resolution]] 3.50&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[8ir3]] is a 10 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=8IR3 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=8IR3 FirstGlance]. <br>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">Electron Microscopy, [[Resolution|Resolution]] 3.5&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=1MA:6-HYDRO-1-METHYLADENOSINE-5-MONOPHOSPHATE'>1MA</scene>, <scene name='pdbligand=2MG:2N-METHYLGUANOSINE-5-MONOPHOSPHATE'>2MG</scene>, <scene name='pdbligand=5MU:5-METHYLURIDINE+5-MONOPHOSPHATE'>5MU</scene>, <scene name='pdbligand=7MG:7N-METHYL-8-HYDROGUANOSINE-5-MONOPHOSPHATE'>7MG</scene>, <scene name='pdbligand=A2M:2-O-METHYLADENOSINE+5-(DIHYDROGEN+PHOSPHATE)'>A2M</scene>, <scene name='pdbligand=B8K:[(2~{R},3~{S},4~{R},5~{R})-5-(2-azanyl-7-ethanoyl-6-oxidanylidene-1,8-dihydropurin-9-yl)-3,4-bis(oxidanyl)oxolan-2-yl]methyl+dihydrogen+phosphate'>B8K</scene>, <scene name='pdbligand=B8Q:[(2~{R},3~{S},4~{R},5~{R})-5-(4-azanyl-3-methyl-2-oxidanylidene-4~{H}-pyrimidin-1-yl)-3,4-bis(oxidanyl)oxolan-2-yl]methyl+dihydrogen+phosphate'>B8Q</scene>, <scene name='pdbligand=B8T:[(2~{R},3~{S},4~{R},5~{R})-5-[4-(methylamino)-2-oxidanylidene-pyrimidin-1-yl]-3,4-bis(oxidanyl)oxolan-2-yl]methyl+dihydrogen+phosphate'>B8T</scene>, <scene name='pdbligand=B8W:[(2~{R},3~{S},4~{R},5~{R})-5-(2-azanyl-6-methoxy-purin-9-yl)-3,4-bis(oxidanyl)oxolan-2-yl]methyl+dihydrogen+phosphate'>B8W</scene>, <scene name='pdbligand=B9B:[(2~{R},3~{S},4~{R},5~{R})-5-(2-azanyl-6-propoxy-purin-9-yl)-3,4-bis(oxidanyl)oxolan-2-yl]methyl+dihydrogen+phosphate'>B9B</scene>, <scene name='pdbligand=B9H:[(2~{R},3~{R},4~{R},5~{R})-5-(4-azanyl-2-oxidanylidene-3-propyl-4~{H}-pyrimidin-1-yl)-4-methoxy-3-oxidanyl-oxolan-2-yl]methyl+dihydrogen+phosphate'>B9H</scene>, <scene name='pdbligand=BGH:[(2~{R},3~{R},4~{R},5~{R})-5-(2-azanyl-7-ethanoyl-6-oxidanylidene-1,8-dihydropurin-9-yl)-4-methoxy-3-oxidanyl-oxolan-2-yl]methyl+dihydrogen+phosphate'>BGH</scene>, <scene name='pdbligand=E7G:[(2~{R},3~{S},4~{R},5~{R})-5-(2-azanyl-7-ethyl-6-oxidanylidene-1,8-dihydropurin-9-yl)-3,4-bis(oxidanyl)oxolan-2-yl]methyl+dihydrogen+phosphate'>E7G</scene>, <scene name='pdbligand=GTP:GUANOSINE-5-TRIPHOSPHATE'>GTP</scene>, <scene name='pdbligand=I4U:[(2~{R},3~{S},4~{R},5~{R})-3,4-bis(oxidanyl)-5-(2-oxidanylidene-4-propan-2-yloxy-pyrimidin-1-yl)oxolan-2-yl]methyl+dihydrogen+phosphate'>I4U</scene>, <scene name='pdbligand=M7A:[(2~{R},3~{S},4~{R},5~{R})-5-(6-azanyl-7-methyl-8~{H}-purin-9-yl)-3,4-bis(oxidanyl)oxolan-2-yl]methyl+dihydrogen+phosphate'>M7A</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=N:ANY+5-MONOPHOSPHATE+NUCLEOTIDE'>N</scene>, <scene name='pdbligand=OMC:O2-METHYLYCYTIDINE-5-MONOPHOSPHATE'>OMC</scene>, <scene name='pdbligand=OMG:O2-METHYLGUANOSINE-5-MONOPHOSPHATE'>OMG</scene>, <scene name='pdbligand=OMU:O2-METHYLURIDINE+5-MONOPHOSPHATE'>OMU</scene>, <scene name='pdbligand=P4U:[(2~{R},3~{S},4~{R},5~{R})-3,4-bis(oxidanyl)-5-(2-oxidanylidene-4-propoxy-pyrimidin-1-yl)oxolan-2-yl]methyl+dihydrogen+phosphate'>P4U</scene>, <scene name='pdbligand=P7G:[(2~{R},3~{S},4~{R},5~{R})-5-(2-azanyl-6-oxidanylidene-7-propyl-3,8-dihydropurin-9-yl)-3,4-bis(oxidanyl)oxolan-2-yl]methyl+dihydrogen+phosphate'>P7G</scene>, <scene name='pdbligand=PSU:PSEUDOURIDINE-5-MONOPHOSPHATE'>PSU</scene>, <scene name='pdbligand=UR3:3-METHYLURIDINE-5-MONOPHOSHATE'>UR3</scene></td></tr>
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=8ir3 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=8ir3 OCA], [https://pdbe.org/8ir3 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=8ir3 RCSB], [https://www.ebi.ac.uk/pdbsum/8ir3 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=8ir3 ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/IF6_HUMAN IF6_HUMAN] Binds to the 60S ribosomal subunit and prevents its association with the 40S ribosomal subunit to form the 80S initiation complex in the cytoplasm (PubMed:10085284, PubMed:14654845, PubMed:21536732, PubMed:32669547). Behaves as a stimulatory translation initiation factor downstream insulin/growth factors. Is also involved in ribosome biogenesis. Associates with pre-60S subunits in the nucleus and is involved in its nuclear export. Cytoplasmic release of TIF6 from 60S subunits and nuclear relocalization is promoted by a RACK1 (RACK1)-dependent protein kinase C activity (PubMed:10085284, PubMed:14654845, PubMed:21536732). In tissues responsive to insulin, controls fatty acid synthesis and glycolysis by exerting translational control of adipogenic transcription factors such as CEBPB, CEBPD and ATF4 that have G/C rich or uORF in their 5'UTR. Required for ROS-dependent megakaryocyte maturation and platelets formation, controls the expression of mitochondrial respiratory chain genes involved in reactive oxygen species (ROS) synthesis (By similarity). Involved in miRNA-mediated gene silencing by the RNA-induced silencing complex (RISC). Required for both miRNA-mediated translational repression and miRNA-mediated cleavage of complementary mRNAs by RISC (PubMed:17507929). Modulates cell cycle progression and global translation of pre-B cells, its activation seems to be rate-limiting in tumorigenesis and tumor growth (By similarity).[HAMAP-Rule:MF_03132]<ref>PMID:10085284</ref> <ref>PMID:14654845</ref> <ref>PMID:17507929</ref> <ref>PMID:21536732</ref> <ref>PMID:32669547</ref> 

==See Also==
*[[Ribosome 3D structures|Ribosome 3D structures]]
*[[Ribosome biogenesis protein 3D structures|Ribosome biogenesis protein 3D structures]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Homo sapiens]]
[[Category: Large Structures]]
[[Category: Gao N]]
[[Category: Zhang Y]]