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Jorge Cruz-Reyes

Cruz-Reyes, Jorge
Jorge Cruz-Reyes
Professor
Office:
BioBio / Room 321A
Email:
Phone:
979-458-3374
https://cruzrey.wixsite.com/cruzreyeslab
Undergraduate Education
B.S. National University of Mexico (1987)
Graduate Education
M.S. National University of Mexico (1989)
Ph.D. London School of Hygiene and Tropical Medicine (1993)
Postdoc. National Institute of Medical Research, UK (1994)
Postdoc. Johns Hopkins School of Medicine (1995-2001)
Joined Texas A&M in 2001

Areas of Research:

RNA Biology in trypanosomes mitochondria

We combine approaches in molecular genetics, structural biology, biochemistry, proteomics, and bioinformatics to study the amazing RNA biology of trypanosome parasites. One research line is on an RNA editing process by uridine insertion and deletion that creates amino acid coding triplets in most mRNAs. Yet a single error in the U-changes yields a frame-shift. Trypanosomes split from other eukaryotic lineages over 100 Ma, yet this editing has analogies with RNAi, CRISPR/Cas9, mRNA splicing and other systems directed by small non-coding RNAs (ncRNAs).

RNA editing is catalyzed by holo-editosomes that include several RNP subcomplexes with over 40 proteins, mRNAs, and hundreds of non-coding guide RNAs (gRNAs). We focus on the regulatory mechanisms of holo-editosome assembly and function. For example, we identified the first catalytic accessory mRNP (termed REH2C), which includes mRNA, the RNA Editing Helicase 2 (REH2) and an intriguing 8-zinc finger termed REH2-Associated Factor 1 (H2F1). We now reconstituted a catalytically active REH2C complex using full-length recombinant proteins. We also have a long tradition using in vitro assays with synthetic RNAs and purified editing components. Multiple collaborations add expertise in protein and RNA structure, homology modeling, deep sequencing, and proteomics to our studies of this vital process in major human parasites.

Development of lead compounds against trypanosomes

A recent new line of investigation in our lab is an exciting collaboration with Tom Meek’s lab that proposes to develop lead drugs with selective inhibitory activity against major potential targets in T. brucei and T. cruzi, the causative agents of important human diseases: African Sleeping Sickness and American Chagas Disease, respectively. Currently, we are testing drugs developed in the Meek lab against N-ribosyl transferases, cruzain, and TbCat B. Our studies also involve molecular analysis of the relevant genes in trypanosomes.

Recent Publications

  1. Cruz-Reyes, J, Mooers, BH, Abu-Adas, Z, Kumar, V, Gulati, S. DEAH-RHA helicase•Znf cofactor systems in kinetoplastid RNA editing and evolutionarily distant RNA processes. RNA Dis. ;3 (2):.
    doi: 10.14800/rd.1336. PubMed PMID:27540585. PubMed Central PMC4987287.

  2. Kumar, V, Madina, BR, Gulati, S, Vashisht, AA, Kanyumbu, C, Pieters, B et al.. REH2C Helicase and GRBC Subcomplexes May Base Pair through mRNA and Small Guide RNA in Kinetoplastid Editosomes. J. Biol. Chem. 2016;291 (11):5753-64.
    doi: 10.1074/jbc.M115.708164. PubMed PMID:26769962. PubMed Central PMC4786712.

  3. Madina, BR, Kumar, V, Mooers, BH, Cruz-Reyes, J. Native Variants of the MRB1 Complex Exhibit Specialized Functions in Kinetoplastid RNA Editing. PLoS ONE. 2015;10 (4):e0123441.
    doi: 10.1371/journal.pone.0123441. PubMed PMID:25928631. PubMed Central PMC4415780.

  4. Madina, BR, Kumar, V, Metz, R, Mooers, BH, Bundschuh, R, Cruz-Reyes, J et al.. Native mitochondrial RNA-binding complexes in kinetoplastid RNA editing differ in guide RNA composition. RNA. 2014;20 (7):1142-52.
    doi: 10.1261/rna.044495.114. PubMed PMID:24865612. PubMed Central PMC4114691.

  5. Madina, BR, Kuppan, G, Vashisht, AA, Liang, YH, Downey, KM, Wohlschlegel, JA et al.. Guide RNA biogenesis involves a novel RNase III family endoribonuclease in Trypanosoma brucei. RNA. 2011;17 (10):1821-30.
    doi: 10.1261/rna.2815911. PubMed PMID:21810935. PubMed Central PMC3185915.

  6. Reifur, L, Yu, LE, Cruz-Reyes, J, Vanhartesvelt, M, Koslowsky, DJ. The impact of mRNA structure on guide RNA targeting in kinetoplastid RNA editing. PLoS ONE. 2010;5 (8):e12235.
    doi: 10.1371/journal.pone.0012235. PubMed PMID:20808932. PubMed Central PMC2923197.

  7. Simpson, L, Aphasizhev, R, Lukes, J, Cruz-Reyes, J. Guide to the nomenclature of kinetoplastid RNA editing: a proposal. Protist. 2010;161 (1):2-6.
    doi: 10.1016/j.protis.2009.10.001. PubMed PMID:19945343. PubMed Central PMC2818556.

  8. Hernandez, A, Madina, BR, Ro, K, Wohlschlegel, JA, Willard, B, Kinter, MT et al.. REH2 RNA helicase in kinetoplastid mitochondria: ribonucleoprotein complexes and essential motifs for unwinding and guide RNA (gRNA) binding. J. Biol. Chem. 2010;285 (2):1220-8.
    doi: 10.1074/jbc.M109.051862. PubMed PMID:19850921. PubMed Central PMC2801250.

  9. Hernandez, A, Panigrahi, A, Cifuentes-Rojas, C, Sacharidou, A, Stuart, K, Cruz-Reyes, J et al.. Determinants for association and guide RNA-directed endonuclease cleavage by purified RNA editing complexes from Trypanosoma brucei. J. Mol. Biol. 2008;381 (1):35-48.
    doi: 10.1016/j.jmb.2008.05.003. PubMed PMID:18572190. PubMed Central PMC2596986.

  10. Alatortsev, VS, Cruz-Reyes, J, Zhelonkina, AG, Sollner-Webb, B. Trypanosoma brucei RNA editing: coupled cycles of U deletion reveal processive activity of the editing complex. Mol. Cell. Biol. 2008;28 (7):2437-45.
    doi: 10.1128/MCB.01886-07. PubMed PMID:18227152. PubMed Central PMC2268434.

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