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Related Concept Videos

Molecular Chaperones and Protein Folding03:00

Molecular Chaperones and Protein Folding

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The native conformation of a protein is formed by interactions between the side chains of its constituent amino acids. When the amino acids cannot form these interactions, the protein cannot fold by itself and needs chaperones. Notably, chaperones do not relay any additional information required for the folding of polypeptides; the native conformation of a protein is determined solely by its amino acid sequence. Chaperones catalyze protein folding without being a part of the folded protein.
The...
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Chromatin Immunoprecipitation- ChIP02:36

Chromatin Immunoprecipitation- ChIP

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Chromatin immunoprecipitation, or ChIP, is an antibody-based technique used to identify sites on DNA that bind to transcription factors of interest or histone proteins. It also helps determine the type of histone modifications such as acetylation, phosphorylation, or methylation.
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Histone Modification02:32

Histone Modification

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The histone proteins have a flexible N-terminal tail extending out from the nucleosome. These histone tails are often subjected to post-translational modifications such as acetylation, methylation, phosphorylation, and ubiquitination. Particular combinations of these modifications form “histone codes” that influence the chromatin folding and tissue-specific gene expression.
Acetylation
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Spreading of Chromatin Modifications02:25

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The histone proteins in the nucleosomes are post-translationally modified (PTM) to increase or decrease access to DNA. The commonly observed PTMs are methylation, acetylation, phosphorylation, and ubiquitination of lysine amino acids in the histone H3 tail region. These histone modifications have specific meaning for the cell. Hence, they are called "histone code". The protein complex involved in histone modification is termed as "reader-writer" complex.
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Bacterial Protein Maturation01:26

Bacterial Protein Maturation

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Bacterial protein maturation is a tightly regulated process that ensures newly synthesized polypeptides achieve correct functional conformations. This maturation involves a series of modifications, folding events, and quality control steps, often assisted by specialized chaperone proteins.N-Terminal ModificationsThe maturation of bacterial polypeptides begins cotranslationally as the polypeptide exits the ribosome. The first amino acid, N-formylmethionine (fMet), is typically modified at the...
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From DNA to Protein03:06

From DNA to Protein

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The flow of genetic information in cells from DNA to mRNA to protein is described by the central dogma, which states that genes specify the sequence of mRNAs, which in turn specify the sequence of amino acids making up all proteins. The decoding of one molecule to another is performed by specific proteins and RNAs. Because the information stored in DNA is so central to cellular function, it makes intuitive sense that the cell would make mRNA copies of this information for protein synthesis...
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Updated: Jul 26, 2025

Detection of the pH-dependent Activity of Escherichia coli Chaperone HdeB In Vitro and In Vivo
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Understanding chaperone specificity: evidence for a 'client code'.

Siddhi Omkar1, Ainella Rysbayeva1, Andrew W Truman1

  • 1Department of Biological Sciences, The University of North Carolina at Charlotte, Charlotte, NC 28223, USA.

Trends in Biochemical Sciences
|June 16, 2023
PubMed
Summary
This summary is machine-generated.

Molecular chaperones interact with clients, regulated by chaperone post-translational modifications (PTMs) or the "chaperone code." This forum explores if client protein PTMs also form a "client code" to influence these interactions.

Keywords:
Hsp70Hsp90chaperonesclientphosphorylationpost-translational modification

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Area of Science:

  • Molecular biology
  • Cellular regulation
  • Protein interactions

Background:

  • Molecular chaperones assist protein folding and are regulated by post-translational modifications (PTMs), termed the 'chaperone code'.
  • The impact of client protein PTMs on chaperone-client interactions remains largely unexplored.

Purpose of the Study:

  • To discuss the potential role of client protein PTMs in regulating chaperone-client interactions.
  • To introduce the concept of a 'client code' analogous to the 'chaperone code'.

Main Methods:

  • This study is a conceptual forum discussion.
  • It reviews existing literature on chaperone and client protein PTMs.

Main Results:

  • Post-translational modifications on client proteins may significantly influence their interactions with molecular chaperones.
  • A 'client code' hypothesis is proposed, suggesting client PTMs act as regulatory signals.

Conclusions:

  • The 'chaperone code' is established, but a parallel 'client code' warrants investigation.
  • Understanding client PTMs could reveal novel regulatory mechanisms in protein homeostasis and cellular function.