Results 71 to 80 of about 199,615 (291)

Conserved structural motifs in PAS, LOV, and CRY proteins regulate circadian rhythms and are therapeutic targets

FEBS Letters, EarlyView.
Cryptochrome and PAS/LOV proteins play intricate roles in circadian clocks where they act as both sensors and mediators of protein–protein interactions. Their ubiquitous presence in signaling networks has positioned them as targets for small‐molecule therapeutics. This review provides a structural introduction to these protein families.
Eric D. Brinckman, Anna E. Lester, Brian D. Zoltowski   +2 more
wiley   +1 more source

A Comprehensive Guide for Performing Sample Preparation and Top-Down Protein Analysis

Proteomes, 2017
Methodologies for the global analysis of proteins in a sample, or proteome analysis, have been available since 1975 when Patrick O′Farrell published the first paper describing two-dimensional gel electrophoresis (2D-PAGE).
Matthew P. Padula, Iain J. Berry, Matthew B. O′Rourke, Benjamin B.A. Raymond, Jerran Santos, Steven P. Djordjevic   +5 more
doaj   +1 more source

Extending the capabilities of intact-mass analyses to monoclonal immunoglobulins of the E-isotype (IgE)

mAbs, 2022
Mass spectrometry (MS) has become an indispensable tool in structural characterization and quality control of monoclonal antibodies (mAbs). Intact-mass analysis is a particularly attractive option that provides a powerful and cost-effective means to not ...
Wenhua Yang, Daniil G. Ivanov, Igor A. Kaltashov   +2 more
doaj   +1 more source

Sequence determinants of RNA G‐quadruplex unfolding by Arg‐rich regions

FEBS Letters, EarlyView.
We show that Arg‐rich peptides selectively unfold RNA G‐quadruplexes, but not RNA stem‐loops or DNA/RNA duplexes. This length‐dependent activity is inhibited by acidic residues and is conserved among SR and SR‐related proteins (SRSF1, SRSF3, SRSF9, U1‐70K, and U2AF1).
Naiduwadura Ivon Upekala De Silva, Puspa Kunwar, Md Ibnul Rifat Rahman, Joanna Koryo Kwao, Nathan Lehman, Zihan Zhang, Trenton Paul, Claire Cheng, Nicholas Truex, Hui‐Ting Lee, Jun Zhang   +10 more
wiley   +1 more source

Discrimination of different species from the genus Drosophila by intact protein profiling using matrix-assisted laser desorption ionization mass spectrometry

BMC Evolutionary Biology, 2010
Background The use of molecular biology-based methods for species identification and establishing phylogenetic relationships has supplanted traditional methods relying on morphological characteristics.
Gröger-Arndt Helke, Kalkhof Stefan, Görner Renate, Feltens Ralph, von Bergen Martin   +4 more
doaj   +1 more source

Structural instability impairs function of the UDP‐xylose synthase 1 Ile181Asn variant associated with short‐stature genetic syndrome in humans

FEBS Letters, EarlyView.
The Ile181Asn variant of human UDP‐xylose synthase (hUXS1), associated with a short‐stature genetic syndrome, has previously been reported as inactive. Our findings demonstrate that Ile181Asn‐hUXS1 retains catalytic activity similar to the wild‐type but exhibits reduced stability, a looser oligomeric state, and an increased tendency to precipitate ...
Tuo Li, Pedro A. Sánchez‐Murcia, Bernd Nidetzky   +2 more
wiley   +1 more source

Unraveling the molecular basis of subunit specificity in P pilus assembly by mass spectrometry [PDF]

, 2008
P pili are multisubunit fibers essential for the attachment of uropathogenic Escherichia coli to the kidney. These fibers are formed by the noncovalent assembly of six different homologous subunit types in an array that is strictly defined in terms of ...
A. E. Ashcroft, Benesch, Choudhury, D. Verger, Dodson, E. Paci, G. Waksman, Gong, H. Remaut, Jacob-Dubuisson, Jacob-Dubuisson, Jones, R. J. Rose, Remaut, Remaut, Roberts, Rose, S. E. Radford, Sauer, Sauer, Sauer, Saulino, Soto, Stathopoulos, T. Daviter, Thanassi, Thanassi, Verger, Zavialov   +28 more
core   +2 more sources

Native ambient mass spectrometry of intact protein assemblies directly fromEscherichia colicolonies

Chemical Communications, 2022
Electroporation combined with native liquid extraction surface analysis mass spectrometry allows analysis of intact protein assemblies directly from bacterial colonies.
Yuying Du, Robin C. May, Helen J. Cooper
openaire   +2 more sources

Structural biology of ferritin nanocages

FEBS Letters, EarlyView.
Ferritin is a conserved iron‐storage protein that sequesters iron as a ferric mineral core within a nanocage, protecting cells from oxidative damage and maintaining iron homeostasis. This review discusses ferritin biology, structure, and function, and highlights recent cryo‐EM studies revealing mechanisms of ferritinophagy, cellular iron uptake, and ...
Eloise Mastrangelo, Flavio Di Pisa
wiley   +1 more source

Improved intact peptide and protein quantitation by LC‐MS: Battling the deleterious effects of analyte adsorption

Analytical Science Advances, 2021
Peptide and protein quantitation by liquid chromatography‐mass spectrometry relies on the assumption of linear signal response with concentration. At low concentrations, analyte adsorption to pipette tips, sample vials and equipment can have significant ...
EmmaRae L. Murphy, Andrew P. Joy, Rodney J. Ouellette, David A. Barnett   +3 more
doaj   +1 more source