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Table 1 Low-rank taxa contributing genes to TeOM degradation in the Amazon River system

From: Uncovering the genomic potential of the Amazon River microbiome to degrade rainforest organic matter

Zone

Genera or closest reference genomes from GTDBa

TeOM degradation step

Upstream, downstream, and estuary

Ramlibacter

Lignin oxidation

Planktophila

Hemicellulose hydrolysis

Methylopumilus, Planktophila, Polynucleobacter

Cellulose hydrolysis

Acidovorax_D, Cupriavidus, Curvibacter_A, Fonsibacter, Hylemonella, Ideonella_A, Limnohabitans, PALSA-911 (Acetobacteraceae), Polaromonas, Polynucleobacter, Ramlibacter, Reyranella, SCGC-AAA027-K21 (Burkholderiaceae), UBA3064 (Burkholderiaceae), UBA6679 (Burkholderiaceae), Z2-YC6860 (Xanthobacteraceae)

TTT system

AAA044-D11 (Nanopelagicaceae), AcAMD-5 (Nanopelagicales), GCA-2737595 (Nanopelagicaceae), Limnohabitans, Nanopelagicus, Planktophila, Polynucleobacter, RS62 (Burkholderiaceae), UBA6679 (Burkholderiaceae), UBA7398 (Nanopelagicaceae)

ABC transporters

Planktophila, Polynucleobacter

FP-dimers

Limnohabitans

FP-monomers

GCA-2737595 (Nanopelagicaceae), Methylopumilus, Planktophila, Fonsibacter

O-demethylation/C1 metabolism

Acidovorax_D, Curvibacter_A, Limnohabitans, Pelomonas

Ring cleavage

Ocean and plume

HIMB11 (Rhodobacteraceae), Pelagibacter

Lignin oxidation

HIMB11 (Rhodobacteraceae)

Hemicellulose hydrolysis

D2472 (Gammaproteobacteria), UBA4465 (Cyclobacteriaceae)

Cellulose hydrolysis

HIMB11 (Rhodobacteraceae), HIMB59 (Alphaproteobacteria), Pelagibacter

TTT system

Pelagibacter, Pelagibacter_A, TMED189 (Acidimicrobiia)

ABC transporters

HIMB11 (Rhodobacteraceae), Pelagibacter

FP-dimers

HIMB11 (Rhodobacteraceae), Pelagibacter

FP-monomers

HIMB11 (Rhodobacteraceae), Pelagibacter, SCGC-AAA076-P13 (Gammaproteobacteria)

O-demethylation

N/A

Ring cleavage

  1. Main prokaryotic genera, or genomes from the Genome Taxonomy Database (GTDB) without assigned genera, contributing genes to TeOM degradation in the Amazon River sections as well as in plume and ocean samples are indicated. Only taxa contributing functions in more than half of the samples of each studied zone are reported
  2. aGenera or GTDB reference-genome names are indicated. For reference genome names, the lowest taxonomic level indicated in GTDB is shown in brackets
  3. FP funneling pathways, TTT tripartite tricarboxylic transporter, N/A not applicable