RT info:eu-repo/semantics/article
T1 Functional specialization and enzymatic mechanisms of poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) (PHBH) degradation in anaerobic digesters: Insights from shotgun metagenomics and molecular modeling
A1 Shafana Farveen, M.
A1 Muñoz Torre, Raúl
A1 Narayanan, Rajnish
A1 García Depraect, Octavio
K1 Anaerobic digestion
K1 Bioplastic
K1 Molecular docking
K1 PHBH
K1 Shotgun metagenomics
K1 3308 Ingeniería y Tecnología del Medio Ambiente
AB This study investigates the anaerobic degradation of poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) (PHBH)using shotgun metagenomics and molecular docking to analyze temporal shifts in microbial communities and keyenzymes under batch and semi-batch conditions. Comparative analysis of the microbial communities revealed adecline in generalist taxa and an increased contribution of Bacteroidota, Chloroflexota, and methanogenicEuryarchaeota. KEGG-annotations suggested that modules affiliated with depolymerases, esterases, β-oxidationand methanogenic pathways would be co-activated. Furthermore, PlasticDB-based computational analysis evi-denced a stepwise enrichment of PHB- and PHA-related enzymes, which confirmed the substrate-mediated mi-crobial specialization. A prominent metagenomic depolymerase (R1_379815) showed well-conserved catalyticresidues (Ser134, His284, Asp211) and a substrate-binding affinity comparable to the native counterpart 9BYU,confirming its substrate preference and functional identity with previously reported PHB depolymerases.Collectively, this integrative metagenomic and computational approach provides mechanistic insights into PHBHbiodegradation under anaerobic conditions, aiding in the identification of potential target enzymes for enhancingplastic degradability and methane recovery in anaerobic digestion systems. These findings contribute to theadvancement of sustainable bioplastic waste management through process-level and enzymatic optimization.
PB Elsevier
SN 2589-014X
YR 2025
FD 2025
LK https://uvadoc.uva.es/handle/10324/80649
UL https://uvadoc.uva.es/handle/10324/80649
LA eng
NO Bioresource Technology Reports, 2025, vol. 32, p. 102424
NO Producción Científica
DS UVaDOC
RD 11-ene-2026