6533b82dfe1ef96bd1290b4d
RESEARCH PRODUCT
Identification of residues in the putative 5th helical region of human interleukin-6, important for activation of the IL-6 signal transducer, gp130
Just P. J. BrakenhoffJoachim GrötzingerStefan Rose JohnLucien A. AardenHanny Klaasse Bossubject
Models MolecularBiophysicsHuman Interleukin-6BiochemistryProtein Structure SecondaryStructure-function analysisgp130Signal Transducer gp130Antigens CDStructural BiologyMutant proteinCytokine Receptor gp130Escherichia coliTumor Cells CulturedGeneticsHumansPoint MutationCloning MolecularInterleukin 6Molecular BiologyAlanineMembrane GlycoproteinsbiologyInterleukin-6Wild typeCell BiologyGlycoprotein 130Recombinant ProteinsProtein Structure TertiaryCell biologyKineticsBiochemistryMutagenesis Site-Directedbiology.proteinLeukemia Erythroblastic AcuteMultiple MyelomaCell DivisionSignal Transductiondescription
AbstractWe have previously shown that L58 in the putative 5th helical region of human interleukin-6 (IL-6) is important for activation of the IL-6 signal transducer gp130 [de Hon et al. (1995) FEBS Lett. 369, 187–191]. To further explore the importance of individual residues in this region for gp130 activation we have now combined Ala substitutions of residues E52, S53, S54, K55, E56, L58 and E60 with other substitutions in IL-6, known to affect gp130 activation (Q160E and T163P). The combination mutant protein with L58A completely lost the capacity to induce the proliferation of XG-1 myeloma cells, and could effectively antagonize wild type IL-6 activity on these cells. Moreover, the data suggest that besides L58, S54 particularly, but also E52, S53, K55 and E56 contribute to gp130 activation.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1996-10-21 | FEBS Letters |