Identification of the glucose transporter in mammalian cell membranes using an /sup 125/(I)-forskolin photoaffinity label

Conference · Fri May 01 04:00:00 EDT 1987 · Fed. Proc., Fed. Am. Soc. Exp. Biol.; (United States)

OSTI ID:6079170

Ruoho, A; Wadzinski, B; Shanahan, M

The glucose transporter has been identified in a variety of mammlian cell membranes using a carrier-free photoactivatable radioiodinated derivative of forskolin, 3-iodo-4-azidophenethylamido-7-0-succinyldeacetyl-forskolin, (I-125)IAPS-Fsk, at 1-10 nM. The membranes which have been photolabeled with (I-125)IAPS-Fsk are: rat cardiac sarcolemmal membranes, rat cortex and cerebellum synaptic membranes, human placental membranes, and wild type S49 lymphoma cell membranes. The glucose transporter in rat cardiac sarcolemmal membranes and rat cortex and cerebellum synaptic membranes was determined to be 45 kDa by SDS-PAGE. Photolysis of human placental membranes and S49 lymphoma membranes with (I-125)IAPS-Fsk followed by SDS-PAGE indicated specific derivatization of a broad band (45-55 kDa) in placental membranes and a narrower band (45 kDa) in the S49 lymphoma membranes. Digestion of the (I-125)IPAS-Fsk labelled placental and S49 lymphoma membranes with endo-B-galactosidase showed a reduction in the apparent molecular weight of the radiolabelled band to 40 kDa. Trypsinization of labelled placental and lymphoma membranes produced an 18 kDa radiolabelled proteolytic fragment. (I-125)IAPS-Fsk is a highly effective probe for identifying low levels of glucose transporters in mammalian tissues.

• Research Organization: Univ. of Wisconsin, Madison
• OSTI ID: 6079170
• Report Number(s): CONF-870644-
• Conference Information: Journal Name: Fed. Proc., Fed. Am. Soc. Exp. Biol.; (United States) Journal Volume: 46:6
• Country of Publication: United States
• Language: English

Related Subjects

550201* -- Biochemistry-- Tracer Techniques
59 BASIC BIOLOGICAL SCIENCES
ALDEHYDES
ANIMAL CELLS
ANIMALS
BETA DECAY RADIOISOTOPES
CARBOHYDRATES
CELL CONSTITUENTS
CELL MEMBRANES
CHEMICAL REACTIONS
DAYS LIVING RADIOISOTOPES
DECOMPOSITION
DISEASES
ELECTRON CAPTURE RADIOISOTOPES
ELECTROPHORESIS
GLUCOSE
HEXOSES
INTERMEDIATE MASS NUCLEI
IODINE 125
IODINE ISOTOPES
ISOTOPE APPLICATIONS
ISOTOPES
LABELLING
LYMPHOMAS
MAMMALS
MAN
MEMBRANE TRANSPORT
MEMBRANES
MOLECULAR WEIGHT
MONOSACCHARIDES
NEOPLASMS
NUCLEI
ODD-EVEN NUCLEI
ORGANIC COMPOUNDS
PHOTOCHEMICAL REACTIONS
PHOTOLYSIS
PRIMATES
PROTEINS
RADIOISOTOPES
RATS
RODENTS
SACCHARIDES
TRACER TECHNIQUES
TUMOR CELLS
VERTEBRATES