2000
DOI: 10.1080/713803743
|View full text |Cite
|
Sign up to set email alerts
|

Macromolecular Mimicry in Translation Initiation: A Model for the Initiation Factor IF2 on the Ribosome

Abstract: SummaryProtein biosynthesis in bacteria is controlled by a number of translation factors. Recent data based on comparison of sequence and structure data of translation factors have established a novel hypothesis for their interaction with the ribosome: initiation, elongation, and termination factors may use a common or partly overlapping binding site on the ribosome in a process of macromolecular mimicry of an A-site-bound tRNA. This paper reviews structural knowledge and tRNA macromolecular mimicry involvemen… Show more

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...
3
1
1

Citation Types

0
9
0

Year Published

2001
2001
2016
2016

Publication Types

Select...
5
3

Relationship

1
7

Authors

Journals

citations
Cited by 15 publications
(9 citation statements)
references
References 54 publications
0
9
0
Order By: Relevance
“…IF-1 binds to the A site and interacts specifically with IF-2, while IF-3 acts as an antiassociation factor, keeping the large and small subunits apart prior to the correct association of the fMet-tRNA fMet anticodon to the P site. The hydrolysis of GTP on IF-2 and the subsequent dissociation of the IFs from the ribosome and the binding of the 50S subunit comprise the final initiation steps: the ribosome is now primed for elongation (6,147,187,239). The presence of IF-2 ⅐ GTP in the 30S initiation complex and GTP hydrolysis during 70S complex formation are essential for the initiation of protein biosynthesis.…”
Section: If-2 (Infb)mentioning
confidence: 99%
See 1 more Smart Citation
“…IF-1 binds to the A site and interacts specifically with IF-2, while IF-3 acts as an antiassociation factor, keeping the large and small subunits apart prior to the correct association of the fMet-tRNA fMet anticodon to the P site. The hydrolysis of GTP on IF-2 and the subsequent dissociation of the IFs from the ribosome and the binding of the 50S subunit comprise the final initiation steps: the ribosome is now primed for elongation (6,147,187,239). The presence of IF-2 ⅐ GTP in the 30S initiation complex and GTP hydrolysis during 70S complex formation are essential for the initiation of protein biosynthesis.…”
Section: If-2 (Infb)mentioning
confidence: 99%
“…Upon peptide release, the ribosome-recycling factor (RRF) binds to the ribosomal A site. Next, EF-G translocates RRF to the P site, which results in the ejection of deacylated tRNA from the ribosome, ultimately leading to dissociation into mRNA, tRNA, and the ribosomal subunits ready for recycling (130,187). EF-G is the target of the antibacterial compound fusidic acid, which binds to EF-G and prevents the release of EF-G ⅐ GDP from the ribosome.…”
Section: Ef-g (Fusa)mentioning
confidence: 99%
“…Based on the alignments of sequences from bacterial, archaeal and eukaryal organisms, IF2 can be divided into a variable N-terminal part and a conserved C-terminal part (Moreno et al . 2000;Sørensen et al .…”
Section: Introductionmentioning
confidence: 99%
“…2001). We have proposed a six-domain structural model for E. coli IF2, in which the variable part corresponds to the N-terminal domains I, II and III, while the conserved part is the C-terminal domains IV, V and VI (Moreno et al . 2000;Mortensen et al .…”
Section: Introductionmentioning
confidence: 99%
“…Initiation of protein biosynthesis is a universal process involving variable combinations and numbers of macromolecular amino acid and nucleotide-based components. A macromolecular core represented by the ribosomal subunits, including rRNAs and ribosomal proteins, initiator tRNA, and two translation initiation factors IF1/eIF1A and IF2/eIF5B, conserved throughout evolution, are essential for appropriate translation initiation (1)(2)(3).…”
Section: Introductionmentioning
confidence: 99%