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Peptide Bonds

Peptide Bonds

A peptide bond covalently attaches amino acids through a dehydration reaction. One amino acid's carboxyl group and another amino acid's amino group combine, releasing a water molecule. The resulting bond is the peptide bond. The products that such linkages form are peptides. As more amino acids join this growing chain, the resulting chain is a polypeptide. Each polypeptide has a free amino group at one end. This end has the N-terminal, or the amino-terminal, and the other end has a free...

Ribosomal RNA Synthesis

Ribosomal RNA Synthesis

Ribosome synthesis is a highly complex and coordinated process involving more than 200 assembly factors. The synthesis and processing of ribosomal components occurs not only in the nucleolus but also in the nucleoplasm and the cytoplasm of eukaryotic cells.
Ribosome biogenesis begins with the synthesis of 5S and 45S pre-rRNAs by distinct RNA polymerases. The primary transcripts are extensively processed and modified before they are bound and folded by ribosomal proteins and assembly factors,...

Ribosomal RNA Synthesis

Ribosomal RNA Synthesis

Ribosome synthesis is a highly complex and coordinated process involving more than 200 assembly factors. The synthesis and processing of ribosomal components occurs not only in the nucleolus but also in the nucleoplasm and the cytoplasm of eukaryotic cells.
Ribosome biogenesis begins with the synthesis of 5S and 45S pre-rRNAs by distinct RNA polymerases. The primary transcripts are extensively processed and modified before they are bound and folded by ribosomal proteins and assembly factors,...

Ribosomes

Ribosomes

Ribosomes translate genetic information encoded by messenger RNA (mRNA) into proteins. Both prokaryotic and eukaryotic cells have ribosomes. Cells that synthesize large quantities of protein—such as secretory cells in the human pancreas—can contain millions of ribosomes.Ribosome Structure and AssemblyRibosomes are composed of ribosomal RNA (rRNA) and proteins. In eukaryotes, rRNA is transcribed from genes in the nucleolus—a part of the nucleus that specializes in ribosome production. Within the...

Ribosomes

Ribosomes

Ribosomes translate genetic information encoded by messenger RNA (mRNA) into proteins. Both prokaryotic and eukaryotic cells have ribosomes. Cells that synthesize large quantities of protein—such as secretory cells in the human pancreas—can contain millions of ribosomes.
Ribosome Structure and Assembly
Ribosomes are composed of ribosomal RNA (rRNA) and proteins. In eukaryotes, rRNA is transcribed from genes in the nucleolus—a part of the nucleus that specializes in ribosome production. Within...

Ribosomes

Ribosomes

Ribosomes translate genetic information encoded by messenger RNA (mRNA) into proteins. Both prokaryotic and eukaryotic cells have ribosomes. Cells that synthesize large quantities of protein—such as secretory cells in the human pancreas—can contain millions of ribosomes.
Ribosome Structure and Assembly
Ribosomes are composed of ribosomal RNA (rRNA) and proteins. In eukaryotes, rRNA is transcribed from genes in the nucleolus—a part of the nucleus that specializes in ribosome production. Within...

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Related Experiment Video

Updated: Jul 5, 2026

Formation of Ordered Biomolecular Structures by the Self-assembly of Short Peptides

Formation of Ordered Biomolecular Structures by the Self-assembly of Short Peptides

Published on: November 21, 2013

Ribosomal peptide-bond formation.

Markus Pech¹, Knud H Nierhaus

¹Max-Planck-Institut für Molekulare Genetik, Berlin, Germany.

Chemistry & Biology

|May 17, 2008

Summary

This summary is machine-generated.

The 23S ribosomal RNA (rRNA) nucleotide A2451's 2'-hydroxyl (2'-OH) group is crucial for ribosomal peptide-bond formation. This finding advances the molecular understanding of this essential biological reaction.

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Area of Science:

Molecular Biology
Biochemistry
Structural Biology

Background:

Ribosomal peptide-bond formation is a fundamental process in protein synthesis.
The precise molecular mechanisms governing the peptidyl transferase center (PTC) remain incompletely understood.
Previous research has identified key components but lacked detailed mechanistic insights.

Discussion:

Lang et al. (2008) elucidate the role of the 2 eal-hydroxyl (2 eal-OH) group of 23S rRNA nucleotide A2451 in catalyzing peptide-bond formation.
This 2 eal-OH group acts as an essential reaction partner, directly participating in the chemical transesterification.
The study provides critical evidence for the direct catalytic involvement of rRNA in peptide bond synthesis.

Key Insights:

The 2 eal-OH group of A2451 is not merely structural but actively participates in the catalytic mechanism.
This finding refines models of the ribosome's peptidyl transferase center.
It highlights the intricate interplay between RNA structure and enzymatic function in the ribosome.

Outlook:

Further investigations can explore the precise chemical transition state stabilization.
Understanding this mechanism could inform the design of novel antibiotics targeting ribosomal function.
Comparative studies across different organisms may reveal evolutionary adaptations of this catalytic motif.