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Kinetics of Binding of Caldesmon to Actin
(East Carolina University, 1995-04-28)
The time course of interaction of caldesmon with actin may be monitored by fluorescence changes that occur upon the binding of 12-(N-methyl-N-(7-nitrobenz-2-oxa-l,3-diazol-4-yl))-labeled caldesmon to actin or to acrylodan ...
Lipid mediators of insulin resistance: ceramide signalling down-regulates GLUT4 gene transcription in 3T3-L1 adipocytes.
(East Carolina University, 1996-10-01)
We have previously demonstrated that chronic exposure of 3T3- L1 adipocytes to tumour necrosis factor-α (TNF) resulted in a marked decrease (~90%) in cellular GLUT4 (insulin-responsive glucose transporter) mRNA content as ...
A Long Helix from the Central Region of Smooth Muscle Caldesmon
(East Carolina University, 1991-07-25)
The central region of smooth muscle caldesmon is predicted to form α-helices on the basis of its primary structure. We have isolated a fragment (CT54) that contains this region. The hydrodynamic
properties and the electron ...
Characterization of a caldesmon fragment that competes with myosin-ATP binding to actin.
(East Carolina University, 1993-08)
The protein caldesmon inhibits actin-activated ATP hydrolysis of myosin and inhibits the binding of myosin*ATP to actin. Afragment isolated from a chymotryptic digest of caldesmon contains features of the intact molecule ...
Ectopic expression of Hel-N1, an RNA-binding protein, increases glucose transporter (GLUT1) expression in 3T3-L1 adipocytes.
(East Carolina University, 1997-02)
3T3-L1 preadipocytes ectopically expressing the mammalian RNA-binding protein Hel-N1 expressed up to 10-fold more glucose transporter (GLUT1) protein and exhibited elevated rates of basal glucose uptake. Hel-N1 is a member ...
Equilibration and Exchange of Fluorescently Labeled Molecules in Skeletal Muscle Fibers Studied Using Confocal Microscopy
(East Carolina University, 1995-04)
Diffusion of molecules into skinned muscle fibers is often necessary when studying muscle contraction and its regulation. Usually, it is assumed that diffusion of molecules is fast also in the structured system of a muscle ...
Insulin responsiveness in skeletal muscle is determined by glucose transporter (Glut4) protein level.
(East Carolina University, 1990-09-01)
Glucose transport in skeletal muscle is mediated by two distinct transporter isoforms, designated muscle/adipose glucose transporter (Glut4) and erythrocyte/HepG2/brain glucose transporter (Glutl), which differ in both ...
The Interaction of Caldesmon with the COOH Terminus of Actin
(East Carolina University, 1991-10-25)
Caldesmon interacts with the NH2-terminal region of actin. It is now shown in airfuge centrifugation experiments that modification of the penultimate cysteine residue of actin significantly weakens its binding to caldesmon ...
Deoxyguanosine-resistant Leukemia L1210 Cells: Loss of Specific Deoxyribonecleoside Kinase Activity
(East Carolina University, 1993-01-05)
A mouse leukemia L1210 cell line was selected for resistance to deoxyguanosine. The deoxyguanosine-resistant cells (dGuo-R) were 126-fold less sensitive to deoxyguanosine than the wild-type cells. The IC50 values for araC ...
Tumour necrosis factor-alpha regulates expression of the CCAAT-enhancer-binding proteins (C/EBPs) alpha and beta and determines the occupation of the C/EBP site in the promoter of the insulin-responsive glucose-transporter gene in 3T3-L1 adipocytes.
(East Carolina University, 1999-03-15)
We have demonstrated previously that treatment of 3T3-L1 adipocytes with tumour necrosis factor-alpha (TNF) results in a rapid (4 h) and significant (75–80%) reduction in the rate of transcription of the GLUT4 gene. Control ...