scholarly journals The structure of ?unstructured? regions in peptides and proteins: Role of the polyproline II helix in protein folding and recognition

Biopolymers ◽  
2005 ◽  
Vol 80 (2-3) ◽  
pp. 179-185 ◽  
Author(s):  
Arianna Rath ◽  
Alan R. Davidson ◽  
Charles M. Deber
Keyword(s):  
Protein Folding ◽  
Polyproline Ii ◽  
Polyproline Ii Helix ◽  
Unstructured Regions

On the Stability of Polyalanine Secondary Structures: The Role of the Polyproline II Helix

ChemPhysChem ◽  
2011 ◽  
Vol 12 (15) ◽  
pp. 2724-2727 ◽  
Author(s):  
Giuseppe Lanza ◽  
Ugo Chiacchio ◽  
Santo Motta ◽  
Sara Pellegrino ◽  
Gianluigi Broggini
Keyword(s):  
Secondary Structures ◽  
Polyproline Ii ◽  
Polyproline Ii Helix ◽  
The Stability

Folding of peptides and proteins: role of disulfide bonds, recent developments

2013 ◽  
Vol 4 (6) ◽  
pp. 597-604 ◽  
Author(s):  
Yuji Hidaka ◽  
Shigeru Shimamoto
Keyword(s):  
Protein Folding ◽  
Disulfide Bonds ◽  
Bond Formation ◽  
Difficult Problem ◽  
Chemical Methods ◽  
Mutant Proteins ◽  
Folding Intermediates ◽  
Peptide Chemistry ◽  
Recent Developments

AbstractDisulfide-containing proteins are ideal models for studies of protein folding as the folding intermediates can be observed, trapped, and separated by HPLC during the folding reaction. However, regulating or analyzing the structures of folding intermediates of peptides and proteins continues to be a difficult problem. Recently, the development of several techniques in peptide chemistry and biotechnology has resulted in the availability of some powerful tools for studying protein folding in the context of the structural analysis of native, mutant proteins, and folding intermediates. In this review, recent developments in the field of disulfide-coupled peptide and protein folding are discussed, from the viewpoint of chemical and biotechnological methods, such as analytical methods for the detection of disulfide pairings, chemical methods for disulfide bond formation between the defined Cys residues, and applications of diselenide bonds for the regulation of disulfide-coupled peptide and protein folding.

scholarly journals Role of mRNA structure in the control of protein folding

2016 ◽  
Vol 44 (22) ◽  
pp. 10898-10911 ◽  
Author(s):  
Guilhem Faure ◽  
Aleksey Y. Ogurtsov ◽  
Svetlana A. Shabalina ◽  
Eugene V. Koonin
Keyword(s):  
Protein Folding ◽  
Mrna Structure

scholarly journals Teasing Apart the Role of the Ribosome and Molecular Chaperones in Cellular Protein Folding

2018 ◽  
Vol 114 (3) ◽  
pp. 414a
Author(s):  
Rayna M. Addabbo ◽  
Matthew D. Dalphin ◽  
Yue Liu ◽  
Miranda F. Mecha ◽  
Silvia Cavagnero
Keyword(s):  
Protein Folding ◽  
Molecular Chaperones ◽  
Cellular Protein

scholarly journals Epitope mapping of human respiratory syncytial virus 22K transcription antitermination factor: role of N-terminal sequences in protein folding

2005 ◽  
Vol 86 (4) ◽  
pp. 1103-1107 ◽  
Author(s):  
Blanca García-Barreno ◽  
John Steel ◽  
Monica Payá ◽  
Luis Martínez-Sobrido ◽  
Teresa Delgado ◽  
...  
Keyword(s):  
Protein Folding ◽  
Respiratory Syncytial Virus ◽  
Western Blotting ◽  
Epitope Mapping ◽  
Human Respiratory Syncytial Virus ◽  
N Terminus ◽  
Transcription Antitermination ◽  
Syncytial Virus ◽  
Antibody Epitopes

The reactivity of a panel of 12 monoclonal antibodies raised against the human respiratory syncytial virus 22 kDa (22K) protein was tested by Western blotting with a set of 22K deletion mutants. The results obtained identified sequences in the C-terminal half of the 22K polypeptide required for integrity of most antibody epitopes, except for epitope 112, which was lost in mutants with short N-terminal deletions. This antibody, in contrast to the others, failed to immunoprecipitate the native 22K protein, indicating that the N terminus of this protein is buried in the native molecule and exposed only under the denaturing conditions of Western blotting. In addition, N-terminal deletions that abolished reactivity with monoclonal antibody 112 also inhibited phosphorylation of the 22K protein previously identified at Ser-58 and Ser-61, suggesting that the N terminus is important in regulating the 22K protein phosphorylation status, most likely as a result of its requirement for protein folding.

scholarly journals Allosteric Modulation of the Dopamine D2Receptor by Pro-Leu-Gly-NH2Peptidomimetics Constrained in Either a Polyproline II Helix or a Type II β-Turn Conformation

2009 ◽  
Vol 52 (7) ◽  
pp. 2043-2051 ◽  
Author(s):  
Bhooma Raghavan ◽  
Kevin J. Skoblenick ◽  
Swapna Bhagwanth ◽  
Niran Argintaru ◽  
Ram K. Mishra ◽  
...  
Keyword(s):  
Allosteric Modulation ◽  
Type Ii ◽  
Polyproline Ii ◽  
Polyproline Ii Helix

Polyproline II Helix Is a Key Structural Motif of the Elastic PEVK Segment of Titin

Biochemistry ◽  
2001 ◽  
Vol 40 (12) ◽  
pp. 3427-3438 ◽  
Author(s):  
Kan Ma ◽  
Lou-sing Kan ◽  
Kuan Wang
Keyword(s):  
Structural Motif ◽  
Polyproline Ii ◽  
Polyproline Ii Helix

scholarly journals Folding initiation sites and protein folding.

1999 ◽  
Vol 46 (3) ◽  
pp. 487-508 ◽  
Author(s):  
M Dadlez
Keyword(s):  
Protein Folding ◽  
Protein Fragments ◽  
Denatured State ◽  
Local Structures ◽  
Rate Limiting Step ◽  
Structural Preferences ◽  
Low Levels ◽  
Rate Limiting ◽  
Transition State Barrier

The paper discusses the role of local structural preferences of protein segments in the folding of proteins. First a short overview of the local, secondary structures detected in peptides, protein fragments, denatured proteins and early folding intermediates is given. Next the discussion of their role in protein folding is presented based on recent literature and data obtained in our laboratory. In conclusion it is pointed out that, during folding, local structures populated at low levels in denatured state may facilitate the crossing of the folding transition state barrier, and consequently accelerate the rate limiting step in folding. However, the data show that this effect does not follow simple rules.

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