6swd

From Proteopedia

(Difference between revisions)

Revision as of 00:55, 7 March 2020

IC2 body model of cryo-EM structure of a full archaeal ribosomal translation initiation complex devoid of aIF1 in P. abyssi

6swd, resolution 3.20Å

Structural highlights

6swd is a 18 chain structure with sequence from [1], Pyrococcus abyssi (strain ge5 / orsay) and Pyrococcus abyssi ge5. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:
Experimental data:	Check to display Experimental Data
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[RS11_PYRAB] Located on the platform of the 30S subunit (By similarity). [RS5_PYRAB] With S4 and S12 plays an important role in translational accuracy. [RS8_PYRAB] One of the primary rRNA binding proteins, it binds directly to 16S rRNA central domain where it helps coordinate assembly of the platform of the 30S subunit. [RS12_PYRAB] With S4 and S5 plays an important role in translational accuracy. Located at the interface of the 30S and 50S subunits. [RS17_PYRAB] One of the primary rRNA binding proteins, it binds specifically to the 5'-end of 16S ribosomal RNA.[HAMAP-Rule:MF_01345] [IF1A_PYRAB] Seems to be required for maximal rate of protein biosynthesis. Enhances ribosome dissociation into subunits and stabilizes the binding of the initiator Met-tRNA(I) to 40 S ribosomal subunits (By similarity). [RS4_PYRAB] One of the primary rRNA binding proteins, it binds directly to 16S rRNA where it nucleates assembly of the body of the 30S subunit. With S5 and S12 plays an important role in translational accuracy.

Publication Abstract from PubMed

Archaeal translation initiation occurs within a macromolecular complex containing the small ribosomal subunit (30S) bound to mRNA, initiation factors aIF1, aIF1A and the ternary complex aIF2:GDPNP:Met-tRNAi(Met). Here, we determine the cryo-EM structure of a 30S:mRNA:aIF1A:aIF2:GTP:Met-tRNAi(Met) complex from Pyrococcus abyssi at 3.2 A resolution. It highlights archaeal features in ribosomal proteins and rRNA modifications. We find an aS21 protein, at the location of eS21 in eukaryotic ribosomes. Moreover, we identify an N-terminal extension of archaeal eL41 contacting the P site. We characterize 34 N(4)-acetylcytidines distributed throughout 16S rRNA, likely contributing to hyperthermostability. Without aIF1, the 30S head is stabilized and initiator tRNA is tightly bound to the P site. A network of interactions involving tRNA, mRNA, rRNA modified nucleotides and C-terminal tails of uS9, uS13 and uS19 is observed. Universal features and domain-specific idiosyncrasies of translation initiation are discussed in light of ribosomal structures from representatives of each domain of life.

Cryo-EM study of an archaeal 30S initiation complex gives insights into evolution of translation initiation.,Coureux PD, Lazennec-Schurdevin C, Bourcier S, Mechulam Y, Schmitt E Commun Biol. 2020 Feb 6;3(1):58. doi: 10.1038/s42003-020-0780-0. PMID:32029867^[1]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ Coureux PD, Lazennec-Schurdevin C, Bourcier S, Mechulam Y, Schmitt E. Cryo-EM study of an archaeal 30S initiation complex gives insights into evolution of translation initiation. Commun Biol. 2020 Feb 6;3(1):58. doi: 10.1038/s42003-020-0780-0. PMID:32029867 doi:http://dx.doi.org/10.1038/s42003-020-0780-0

1 Structural highlights
2 Function
3 Publication Abstract from PubMed
4 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/6swd"

@@ Line 1: / Line 1: @@
 ==IC2 body model of cryo-EM structure of a full archaeal ribosomal translation initiation complex devoid of aIF1 in P. abyssi==
-<StructureSection load='6swd' size='340' side='right'caption='[[6swd]], [[Resolution|resolution]] 3.20&Aring;' scene=''>
+<SX load='6swd' size='340' side='right' viewer='molstar' caption='[[6swd]], [[Resolution|resolution]] 3.20&Aring;' scene=''>
 == Structural highlights ==
 <table><tr><td colspan='2'>[[6swd]] is a 18 chain structure with sequence from [http://en.wikipedia.org/wiki/ ], [http://en.wikipedia.org/wiki/Pyrococcus_abyssi_(strain_ge5_/_orsay) Pyrococcus abyssi (strain ge5 / orsay)] and [http://en.wikipedia.org/wiki/Pyrococcus_abyssi_ge5 Pyrococcus abyssi ge5]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6SWD OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=6SWD FirstGlance]. <br>
@@ Line 22: / Line 22: @@
 <references/>
 __TOC__
-</StructureSection>
+</SX>
 [[Category: Large Structures]]
 [[Category: Pyrococcus abyssi ge5]]

6swd

From Proteopedia

Revision as of 00:55, 7 March 2020

IC2 body model of cryo-EM structure of a full archaeal ribosomal translation initiation complex devoid of aIF1 in P. abyssi

Structural highlights

Function

Publication Abstract from PubMed

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

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