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Profil bibliographique

R. Chalk

Informations fournies par OpenAlex. Research Africa ne déduit ni nationalité, ni poste, ni coordonnées personnelles.

99Publications signalées
1549Citations signalées
4Affiliations récentes

Les institutions déclarées

Les domaines associés

Folate and B Vitamins ResearchGlycosylation and Glycoproteins ResearchAdvanced biosensing and bioanalysis techniquesRNA and protein synthesis mechanismsMetabolism and Genetic Disorders

Les publications récentes

Accès ouvert 2026 article OpenAlex

Design principles of a membrane-spanning ubiquitin ligase

Chris Williams, Laura M. Nocka, George Hedger, Pragya Parashara et autres

Receptor-type E3 ubiquitin ligases enable extracellular signals to control ubiquitylation in the cytoplasm, playing widespread roles in development, metabolism, and immunity. Using cryoelectron microscopy, integrated with biophysical and functional studies, we visualized a human E3 complex composed of two transmembrane proteins, MEGF8 …

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2 citations Molecular Cell
Accès ouvert 2026 article OpenAlex

Structural insights into cobalamin loading and reactivation of human methionine synthase

Douglas S. M. Ferreira, Katie McLennan, M. Vollmar, W. Kiyani et autres

Human methionine synthase (MTR) is an essential enzyme of one carbon metabolism. Consisting of a catalytic N-half and a cobalamin binding C-half, MTR utilises this intricate organometallic cofactor in the methyl transfer from methyltetrahydrofolate to homocysteine producing methionine. Cobalamin loading into MTR, …

gb, ch, de, se, us (code pays fourni par la source)

0 citations Nature Communications
Accès ouvert 2026 preprint OpenAlex

DNA-induced conformational changes in SPRTN relieve its auto-inhibitory effect on protease activity

Wei Song, J.A. Newman, Yichen Zhao, R. Chalk et autres

The DNA-dependent metalloprotease SPRTN has emerged as a key enzyme in the proteolysis of DNA-protein crosslinks (DPCs), thereby protecting us against genome instability, accelerated ageing, and cancer. DNA and ubiquitin chains serve as the primary activator and catalyst of SPRTN proteolysis, respectively, …

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0 citations bioRxiv (Cold Spring Harbor Laboratory)
Accès ouvert 2025 article OpenAlex

Crystal structure of fatty acid thioesterase A bound by 129 fragments provides diverse development opportunities

Eva Kot, Matteo P. Ferla, Patricia Helen Hollinshead, Charles W.E. Tomlinson et autres

Abstract BACKGROUND In order to alleviate the growing issue of herbicide resistance, diversification of the herbicide portfolio is necessary. A promising yet underutilized mode‐of‐action is the inhibition of fatty acid thioesterases (FATs), which terminate de novo fatty acid (FA) biosynthesis by releasing …

ca, gb, ch, Afrique du Sud (code pays fourni par la source)

3 citations Pest Management Science
Accès ouvert 2024 article OpenAlex

Covalent Inhibitors of KEAP1 with Exquisite Selectivity

Imre Fejes, Piroska Markacz, János Tatai, Mónika Rudas et autres

The NRF2-KEAP1 interaction is central for cytoprotection against stresses, giving it high clinical significance. Covalent modification of KEAP1 is an efficient approach, but the covalent inhibitors used in the clinic carry undesired side effects originating in their moderate selectivity. Starting with a …

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8 citations Journal of Medicinal Chemistry
Accès ouvert 2024 article OpenAlex

Structural basis of the mechanism and inhibition of a human ceramide synthase

Tomas C. Pascoa, A.C.W. Pike, Christofer S. Tautermann, Gamma Chi et autres

Ceramides are bioactive sphingolipids crucial for regulating cellular metabolism. Ceramides and dihydroceramides are synthesized by six ceramide synthase (CerS) enzymes, each with specificity for different acyl-CoA substrates. Ceramide with a 16-carbon acyl chain (C16 ceramide) has been implicated in obesity, insulin resistance …

gb, de, ch (code pays fourni par la source)

19 citations Nature Structural & Molecular Biology
Accès ouvert 2024 article OpenAlex

Characterization of covalent inhibitors that disrupt the interaction between the tandem SH2 domains of SYK and FCER1G phospho-ITAM

Hang Fu, Katis V.L., Axtman A.D., Cary G.A. et autres

RNA sequencing and genetic data support spleen tyrosine kinase (SYK) and high affinity immunoglobulin epsilon receptor subunit gamma (FCER1G) as putative targets to be modulated for Alzheimer’s disease (AD) therapy. FCER1G is a component of Fc receptor complexes that contain an immunoreceptor …

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0 citations Carolina Digital Repository (University of North Carolina at Chapel Hill)
Accès ouvert 2024 article OpenAlex

Characterization of covalent inhibitors that disrupt the interaction between the tandem SH2 domains of SYK and FCER1G phospho-ITAM

Frances M. Bashore, V.L. Katis, Yuhong Du, Arunima Sikdar et autres

RNA sequencing and genetic data support spleen tyrosine kinase (SYK) and high affinity immunoglobulin epsilon receptor subunit gamma (FCER1G) as putative targets to be modulated for Alzheimer's disease (AD) therapy. FCER1G is a component of Fc receptor complexes that contain an immunoreceptor …

us, gb (code pays fourni par la source)

8 citations PLoS ONE
Accès ouvert 2024 article OpenAlex

Regulation of inositol 5-phosphatase activity by the C2 domain of SHIP1 and SHIP2

W.J. Bradshaw, Emma C. Kennedy, Tiago Moreira, Luke Smith et autres

SHIP1, an inositol 5-phosphatase, plays a central role in cellular signaling. As such, it has been implicated in many conditions. Exploiting SHIP1 as a drug target will require structural knowledge and the design of selective small molecules. We have determined apo, and …

gb (code pays fourni par la source)

24 citations Structure
Accès ouvert 2024 article OpenAlex

BTB domain mutations perturbing KCTD15 oligomerisation cause a distinctive frontonasal dysplasia syndrome

Kerry A. Miller, David A. Cruz Walma, Daniel M. Pinkas, Rebecca S Tooze et autres

Introduction KCTD15 encodes an oligomeric BTB domain protein reported to inhibit neural crest formation through repression of Wnt/beta-catenin signalling, as well as transactivation by TFAP2. Heterozygous missense variants in the closely related paralogue KCTD1 cause scalp-ear-nipple syndrome. Methods Exome sequencing was performed …

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12 citations Journal of Medical Genetics
Accès ouvert 2023 preprint OpenAlex

Structural basis of the mechanism and inhibition of a human ceramide synthase

Tomas C. Pascoa, A.C.W. Pike, Christofer S. Tautermann, Gamma Chi et autres

Abstract Ceramides are bioactive sphingolipids that play pivotal roles in regulating cellular metabolism. Ceramides and dihydroceramides are synthesized by a family of six ceramide synthase enzymes (CerS), each with distinct specificity for the acyl-CoA substrate. Importantly, the acyl chain length plays a …

gb, de, ch (code pays fourni par la source)

6 citations bioRxiv (Cold Spring Harbor Laboratory)
Accès ouvert 2023 article OpenAlex

Structural characterization of human urea transporters UT-A and UT-B and their inhibition

Gamma Chi, Larissa Dietz, Haiping Tang, M. Snee et autres

In this study, we present the structures of human urea transporters UT-A and UT-B to characterize them at molecular level and to detail the mechanism of UT-B inhibition by its selective inhibitor, UTB inh -14. High-resolution structures of both transporters establish the …

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15 citations Science Advances

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