The uniqueness of tryptophan in biology: properties, metabolism, interactions and localization in proteins

S Barik - International journal of molecular sciences, 2020 - mdpi.com
Tryptophan (Trp) holds a unique place in biology for a multitude of reasons. It is the largest
of all twenty amino acids in the translational toolbox. Its side chain is indole, which is …

Role of the lipid bilayer in outer membrane protein folding in Gram-negative bacteria

JE Horne, DJ Brockwell, SE Radford - Journal of Biological Chemistry, 2020 - ASBMB
β-Barrel outer membrane proteins (OMPs) represent the major proteinaceous component of
the outer membrane (OM) of Gram-negative bacteria. These proteins perform key roles in …

[HTML][HTML] Selective antimicrobial action is provided by phenol-soluble modulins derived from Staphylococcus epidermidis, a normal resident of the skin

AL Cogen, K Yamasaki, KM Sanchez… - Journal of Investigative …, 2010 - Elsevier
Antimicrobial peptides serve as a first line of innate immune defense against invading
organisms such as bacteria and viruses. In this study, we hypothesized that peptides …

Side-chain hydrophobicity scale derived from transmembrane protein folding into lipid bilayers

CP Moon, KG Fleming - Proceedings of the National …, 2011 - National Acad Sciences
The transfer free energies of the twenty natural amino acid side chains from water to
phospholipid bilayers make a major contribution to the assembly and function of membrane …

[HTML][HTML] The role of tryptophan side chains in membrane protein anchoring and hydrophobic mismatch

AJ de Jesus, TW Allen - Biochimica et Biophysica Acta (BBA) …, 2013 - Elsevier
Tryptophan (Trp) is abundant in membrane proteins, preferentially residing near the lipid–
water interface where it is thought to play a significant anchoring role. Using a total of 3μs of …

Membrane protein thermodynamic stability may serve as the energy sink for sorting in the periplasm

CP Moon, NR Zaccai, PJ Fleming… - Proceedings of the …, 2013 - National Acad Sciences
Thermodynamic stabilities are pivotal for understanding structure–function relationships of
proteins, and yet such determinations are rare for membrane proteins. Moreover, the few …

[HTML][HTML] Folding of β-barrel membrane proteins in lipid bilayers—Unassisted and assisted folding and insertion

JH Kleinschmidt - Biochimica et Biophysica Acta (BBA)-Biomembranes, 2015 - Elsevier
In cells, β-barrel membrane proteins are transported in unfolded form to an outer membrane
into which they fold and insert. Model systems have been established to investigate the …

[HTML][HTML] Transmembrane β-barrels: Evolution, folding and energetics

D Chaturvedi, R Mahalakshmi - Biochimica et Biophysica Acta (BBA) …, 2017 - Elsevier
The biogenesis of transmembrane β-barrels (outer membrane proteins, or OMPs) is an
elaborate multistep orchestration of the nascent polypeptide with translocases, barrel …

Tryptophan-lipid interactions in membrane protein folding probed by ultraviolet resonance Raman and fluorescence spectroscopy

KM Sanchez, G Kang, B Wu, JE Kim - Biophysical Journal, 2011 - cell.com
Aromatic amino acids of membrane proteins are enriched at the lipid-water interface. The
role of tryptophan on the folding and stability of an integral membrane protein is investigated …

Using tryptophan fluorescence to measure the stability of membrane proteins folded in liposomes

CP Moon, KG Fleming - Methods in enzymology, 2011 - Elsevier
Accurate measurements of the thermodynamic stability of folded membrane proteins require
methods for monitoring their conformation that are free of experimental artifacts. For …