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16 results on '"Feldman, R.M."'

2. A complex of Cdc4p, Skp1p, and Cdc53p/Cullin catalyzes ubiquitination of the phosphorylated CDK inhibitor Sic1p

Author

Feldman, R.M. Renny, Correll, Craig C., Kaplan, Kenneth B., and Deshaies, Raymond J.

Subjects
Ubiquitin -- Research, Protein kinases -- Research, Saccharomyces -- Research, Proteolysis -- Research, Biological sciences
Abstract

Research was conducted to examine the reconstitution of Sic1p ubiquitination with a set of purified proteins, including Cdc4p, Cdc53p and Skp1p and to show that Cdc4p, Cdc53p and Skp1p assemble into an E3 complex that selectively recognizes phosphorylated Sic1p through its Cdc4p and Skp1p subunits. Unfractionated inset cell lysates containing Cdc4p, ubiquitin and an ATP-regenerating system were mixed. Results indicate that phosphorylation-triggered ubiquitin-dependent proteolysis may be mediated by a conserved cullin-dependent pathway in eukaryotic cells.

Published
1997

3. Association of Genetic Variants With Primary Open-Angle Glaucoma Among Individuals With African Ancestry

Author

Hauser, M.A., Allingham, R.R., Aung, T., Heide, C.J. Van Der, Taylor, K.D., Rotter, J.I., Wang, S.J., Bonnemaijer, P.W.M., Williams, S.E., Abdullahi, S.M., Abu-Amero, K.K., Anderson, M.G., Akafo, S., Alhassan, M.B., Asimadu, I., Ayyagari, R., Bakayoko, S., Nyamsi, P.B., Bowden, D.W., Bromley, W.C., Budenz, D.L., Carmichael, T.R., Challa, P., Chen, Yi, Chuka-Okosa, C.M., Bailey, J.N., Costa, V.P., Cruz, Dario, DuBiner, H., Ervin, J.F., Feldman, R.M., Flamme-Wiese, M., Gaasterland, D.E., Garnai, S.J., Girkin, C.A., Guirou, N., Guo, X., Haines, J.L., Hammond, C.J., Herndon, L., Hoffmann, T.J., Hulette, C.M., Hydara, A., Igo, R.P., Jr., Jorgenson, E., Kabwe, J., Kilangalanga, N.J., Kizor-Akaraiwe, N., Kuchtey, R.W., Lamari, H., Li, Z, Liebmann, J.M., Liu, Y, Loos, R.J., Melo, M.B., Moroi, S.E., Msosa, J.M., Mullins, R.F., Nadkarni, G., Napo, A., Ng, M.C., Nunes, H.F., Obeng-Nyarkoh, E., Okeke, A., Okeke, S., Olaniyi, O., Olawoye, O., Oliveira, M.B., Pasquale, L.R., Perez-Grossmann, R.A., Pericak-Vance, M.A., Qin, X., Ramsay, M., Resnikoff, S., Richards, J.E., Schimiti, R.B., Sim, K.S., Sponsel, W.E., Svidnicki, P.V., Thiadens, A., Uche, N.J., Duijn, C.M. van, Vasconcellos, J.P.C. de, Wiggs, J.L., Zangwill, L.M., Risch, N., Milea, D., Ashaye, A., Klaver, C.C.W., Weinreb, R.N., Koch, A.E., Fingert, J.H., Khor, C.C., Hauser, M.A., Allingham, R.R., Aung, T., Heide, C.J. Van Der, Taylor, K.D., Rotter, J.I., Wang, S.J., Bonnemaijer, P.W.M., Williams, S.E., Abdullahi, S.M., Abu-Amero, K.K., Anderson, M.G., Akafo, S., Alhassan, M.B., Asimadu, I., Ayyagari, R., Bakayoko, S., Nyamsi, P.B., Bowden, D.W., Bromley, W.C., Budenz, D.L., Carmichael, T.R., Challa, P., Chen, Yi, Chuka-Okosa, C.M., Bailey, J.N., Costa, V.P., Cruz, Dario, DuBiner, H., Ervin, J.F., Feldman, R.M., Flamme-Wiese, M., Gaasterland, D.E., Garnai, S.J., Girkin, C.A., Guirou, N., Guo, X., Haines, J.L., Hammond, C.J., Herndon, L., Hoffmann, T.J., Hulette, C.M., Hydara, A., Igo, R.P., Jr., Jorgenson, E., Kabwe, J., Kilangalanga, N.J., Kizor-Akaraiwe, N., Kuchtey, R.W., Lamari, H., Li, Z, Liebmann, J.M., Liu, Y, Loos, R.J., Melo, M.B., Moroi, S.E., Msosa, J.M., Mullins, R.F., Nadkarni, G., Napo, A., Ng, M.C., Nunes, H.F., Obeng-Nyarkoh, E., Okeke, A., Okeke, S., Olaniyi, O., Olawoye, O., Oliveira, M.B., Pasquale, L.R., Perez-Grossmann, R.A., Pericak-Vance, M.A., Qin, X., Ramsay, M., Resnikoff, S., Richards, J.E., Schimiti, R.B., Sim, K.S., Sponsel, W.E., Svidnicki, P.V., Thiadens, A., Uche, N.J., Duijn, C.M. van, Vasconcellos, J.P.C. de, Wiggs, J.L., Zangwill, L.M., Risch, N., Milea, D., Ashaye, A., Klaver, C.C.W., Weinreb, R.N., Koch, A.E., Fingert, J.H., and Khor, C.C.

Abstract

Item does not contain fulltext, Importance: Primary open-angle glaucoma presents with increased prevalence and a higher degree of clinical severity in populations of African ancestry compared with European or Asian ancestry. Despite this, individuals of African ancestry remain understudied in genomic research for blinding disorders. Objectives: To perform a genome-wide association study (GWAS) of African ancestry populations and evaluate potential mechanisms of pathogenesis for loci associated with primary open-angle glaucoma. Design, Settings, and Participants: A 2-stage GWAS with a discovery data set of 2320 individuals with primary open-angle glaucoma and 2121 control individuals without primary open-angle glaucoma. The validation stage included an additional 6937 affected individuals and 14917 unaffected individuals using multicenter clinic- and population-based participant recruitment approaches. Study participants were recruited from Ghana, Nigeria, South Africa, the United States, Tanzania, Britain, Cameroon, Saudi Arabia, Brazil, the Democratic Republic of the Congo, Morocco, Peru, and Mali from 2003 to 2018. Individuals with primary open-angle glaucoma had open iridocorneal angles and displayed glaucomatous optic neuropathy with visual field defects. Elevated intraocular pressure was not included in the case definition. Control individuals had no elevated intraocular pressure and no signs of glaucoma. Exposures: Genetic variants associated with primary open-angle glaucoma. Main Outcomes and Measures: Presence of primary open-angle glaucoma. Genome-wide significance was defined as P < 5 x 10-8 in the discovery stage and in the meta-analysis of combined discovery and validation data. Results: A total of 2320 individuals with primary open-angle glaucoma (mean [interquartile range] age, 64.6 [56-74] years; 1055 [45.5%] women) and 2121 individuals without primary open-angle glaucoma (mean [interquartile range] age, 63.4 [55-71] years; 1025 [48.3%] women) were included in the discovery GWAS. Th

Published
2019

4. Effects of peptide length and composition on binding to an empty class I MHC heterodimer

Author

Fahnestock, Margaret L., Johnson, Jennifer L., Feldman, R.M. Renny, Tsomides, Theodore J., Mayer, John, Narhi, Linda O., and Bjorkman, Pamela J.

Subjects
Peptides -- Research, Ligand binding (Biochemistry) -- Research, Biological sciences, Chemistry
Abstract

The variations in anchor residues or length of the peptide determine the binding affinity. The optimal peptides binding to Kd heterodimer and other class I molecules have Kd values in the nonamer range. For Kd-restricted peptides, the preference for nonamer or octamer depends on the particular peptide sequence. Labeling peptides for binding studies require proper care to prevent chemical alteration binding properties.

Published
1994

5. Optimization of process improvement and inspection location for serial manufacturing.

Author

Deliman, N.C. and Feldman, R.M.

Subjects
MANUFACTURING processes, QUALITY control
Abstract

This paper deals with serial manufacturing systems with imperfect inspection and rework of defective items. An inspector may not correctly identify a defective item; however, nondefective items are always correctly identified. Inspection stations, when they are used, screen all incoming units. Our objective is to develop a method that will determine which process steps to improve, the amount of process improvement, and the placement of inspection stations so that the expected per unit total cost of production is minimized. The dynamics of the process is modelled as a Markov renewal process and a gradient search procedure is used to optimize process improvement. [ABSTRACT FROM AUTHOR]

Published
1996
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13. Suramin inhibits wound healing following filtering procedures for glaucoma

Author

Mietz, H., Chévez-Barrios, P., Lieberman, M.W., and Feldman, R.M.

Abstract

Background Trabeculectomies are the most frequently performed procedures in surgically treating eyes with glaucoma. Failures are caused by fibrosis in the external ostium of the filtering procedure. In order to inhibit the fibrotic wound healing reaction, a new pharmacological approach using suramin, which inhibits a variety of important growth factors was used. Methods Pigmented rabbits were used and filtering procedures performed. Suramin was applied with concentrations ranging from 10 mg/ml to 333 mg/ml once during surgery and four times following surgery. The success of the filtering procedure was assessed by intraocular pressure measurements. To evaluate possible intraocular toxic effects, treated eyes were histopathologically evaluated after 4 weeks, and the ciliary body adjacent to the site of application was examined using electron microscopy. Results With concentrations of suramin of 200 mg/ml and 333 mg/ml, the trabeculectomies were patent longer than in the controls and in eyes operated with mitomycin C, which currently is the most frequently used antiproliferative drug to enhance the outcome of surgery in humans. No severe toxic effects to the ciliary epithelium were seen in suramin treated eyes. Conclusions This study demonstrates for the first time the efficiency of a substance that broadly inhibits the action of growth factors on target cells in the setting of ocular wound healing. In this in vivo model, suramin has been shown to be highly effective in preventing scarring and in having fewer toxic side effects than usually used antimetabolites. These results therefore may suggest a new approach to the surgical treatment of glaucoma.

Published
1998

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