Identification of Glucoamylase cDNA Sequence of Saccharomycopsis (Syn. Endomycopsis) bubodii 2066

  • Joel H. G. Tolentino College of Science and Mathematics, University of the Philippines Mindanao, Davao City 8022
  • Kevin L. Labrador College of Science and Mathematics, University of the Philippines Mindanao, Davao City 8022
  • Jennifer P. Fronteras College of Science and Mathematics, University of the Philippines Mindanao, Davao City 8022
  • Lani L. R. Bullo College of Science and Mathematics, University of the Philippines Mindanao, Davao City 8022
  • Leslie P. M. Cancio College of Science and Mathematics, University of the Philippines Mindanao, Davao City 8022
  • Joanne J. J. AƱonuevo College of Science and Mathematics, University of the Philippines Mindanao, Davao City 8022
  • Gabriel P. G. Eleria College of Science and Mathematics, University of the Philippines Mindanao, Davao City 8022
  • Annabelle U. Novero College of Science and Mathematics, University of the Philippines Mindanao, Davao City 8022
Keywords: glucoamylase, cDNA, primer walking, Saccharomycopsis bubodii, Saccharomycopsis fibuligera, sago starch

Abstract

Saccharomycopsis (Syn. Endomycopsis) bubodii 2066 is an isolate from bubod, a starter used in making rice wine in northern Philippines. We have shown that the yeast has amylolytic activity on raw sago starch. In our attempt to identify the putative raw starch-digesting amylase in S. bubodii, we determined the cDNA sequence of a glucoamylase gene. One primer pair that was designed based on a glucoamylase of Saccharomycopsis fibuligera HUT7212 (GLU1, NCBI Accession Number L25641.1) produced a sequence of 1234 base pairs. To obtain a wider coverage, a primer walking strategy was carried out using four primer pairs designed based on GLU1 gene. The generated sequence of 1535 base pairs shows 98.7 to 100% homology when aligned with glucoamylase genes from four strains of S. fibuligera suggesting that this glucoamylase is highly conserved between the Saccharomycopsis species. This work further reports a gene sequence of glucoamylase derived from Philippine-isolated yeast. The sequence is deposited in GenBank and assigned the accession number KP068007.1. The gene may be heterologously expressed in Saccharomyces cerevisiae for possible utilization in the direct conversion of raw sago starch to bioethanol.
Published
2016-12-20
How to Cite
Tolentino, J., Labrador, K., Fronteras, J., Bullo, L., Cancio, L., AƱonuevo, J., Eleria, G., & Novero, A. (2016). Identification of Glucoamylase cDNA Sequence of Saccharomycopsis (Syn. Endomycopsis) bubodii 2066. KIMIKA, 27(2), 14-27. https://doi.org/https://doi.org/10.26534/kimika.v27i2.14-27
Section
Research Articles