Kayunta Johnson-Winters

Teaching chemistry for a more circular world

Fun Man Fung, Fabian Hollinger, Francesca M. Kerton, Mikhailey D. Wheeler et autres

Kinetic investigation on d-amino acid containing peptides and carboxypeptidase Y

Joshua I. Putman, Arzoo Patel, Maria Olds, Alaa Aziz et autres

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The U1 snRNP-specific protein U1C is a key regulator of SMN complex–mediated snRNP formation

Duc Minh Ngu, Sanat Myti, Ayesha Ali Khan, Jeanne Keita et autres

The stability and abundance of spliceosomal small nuclear ribonucleoproteins (snRNPs) are determined by the assembly of an Sm protein ring (Sm core) on each snRNA, a process orchestrated by the survival of motor neurons (SMN) complex. While the role of the SMN …

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Kinetic Characterization of F420-Dependent Sugar-6-Phosphate Dehydrogenase from Cryptosporangium arvum

Alaa Aziz, Desiree R. Czapski, Ravi Ramkissoon, Md Sabid Ahamed et autres

High Resolution Image Download MS PowerPoint Slide F 420 -dependent glucose-6-phosphate dehydrogenase (FGD) catalyzes the oxidation of glucose-6-phosphate (G6P) to 6-phosphogluconolactone (6PG). Recent phylogenetic analyses have identified a new subclass of these enzymes, F 420 -dependent sugar-6-phosphate dehydrogenases (FSDs), which act on …

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Abstract 2375 An alteration in inter-subunit communication within F420H2:NADP+ oxidoreductase: From negative to no cooperativity

Jamariya Howard, Alaa Aziz, Lindsay Davis, Denzel Pugh et autres

F420H2:NADP+ oxidoreductase (Fno) catalyzes the reversible reduction of NADP+ to NADPH by using the reduced F420 cofactor as a hydride donor. Both NADPH and the F420 cofactor are essential in various metabolic processes in methanogenic and sulfate-reducing archaea. Previous steady-state kinetic studies …

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From Negative to No Cooperativity: Effects of Mutations on Intersubunit Communication within F420H2:NADP+ Oxidoreductase Using Steady-State and Pre-Steady-State Kinetic Methods

Jamariya Howard, Alaa Aziz, Lindsay Davis, Denzel Pugh et autres

F 420 H 2:NADP + oxidoreductase (Fno) catalyzes the reversible production of NADPH by transferring a hydride from the reduced F 420 cofactor to NADP + . Previous kinetic studies suggest that wild-type Fno ( wt Fno) displays half-site reactivity and negative …

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Evidence of a Catalytic Dyad in F420-Dependent Glucose-6-phosphate Dehydrogenase from Mycobacterium tuberculosis

Alaa Aziz, Lindsay Davis, Ravi Ramkissoon, Neema Zeighami et autres

F 420 -dependent glucose-6-phosphate dehydrogenase (FGD) catalyzes the conversion of glucose-6-phosphate (G6P) to 6-phosphogluconolactone, using cofactor F 420 as the hydride transfer acceptor. Our previous pH dependence studies suggested that E109 serves as an active site acid, donating a proton to the …

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U1 snRNP-Specific U1C Acts as the Gatekeeper of the Survival of Motor Neurons (SMN) Complex in snRNP Biogenesis

Duc Minh Ngu, Sanat Myti, Ayesha Ali Khan, Jeannine Keita et autres

SUMMARY The stability and abundance of spliceosomal snRNPs are determined by the assembly of an Sm protein ring (Sm core) on each snRNA, a process facilitated by the survival of motor neuron (SMN) complex. Whereas the SMN complex’s role as a chaperone …

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