Transport of symbiont-encoded cellulases from the gill to the gut of shipworms via the enigmatic ducts of Deshayes: a 174-year mystery solved

Altamia, Marvin A.; Distel, Daniel L.

doi:10.1098/rspb.2022.1478

i

Transport of symbiont-encoded cellulases from the gill to the gut of shipworms via the enigmatic ducts of Deshayes: a 174-year mystery solved

2022
By Altamia, Marvin A. ; Distel, Daniel L.

Details

Journal Title:

Proceedings of the Royal Society B: Biological Sciences
Personal Author:

Altamia, Marvin A. ; Distel, Daniel L.
NOAA Program & Office:

OAR (Oceanic and Atmospheric Research)
Description:

Shipworms (Bivalvia, Teredinidae) are the principal consumers of wood in marine environments. Like most wood-eating organisms, they digest wood with the aid of cellulolytic enzymes supplied by symbiotic bacteria. However, in shipworms the symbiotic bacteria are not found in the digestive system. Instead, they are located intracellularly in the gland of Deshayes, a specialized tissue found within the gills. It has been independently demonstrated that symbiont-encoded cellulolytic enzymes are present in the digestive systems and gills of two shipworm species, Bankia setacea and Lyrodus pedicellatus , confirming that these enzymes are transported from the gills to the lumen of the gut. However, the mechanism of enzyme transport from gill to gut remains incompletely understood. Recently, a mechanism was proposed by which enzymes are transported within bacterial cells that are expelled from the gill and transported to the mouth by ciliary action of the branchial or food grooves. Here we use in situ immunohistochemical methods to provide evidence for a different mechanism in the shipworm B. setacea , in which cellulolytic enzymes are transported via the ducts of Deshayes, enigmatic structures first described 174 years ago, but whose function have remained unexplained.
Keywords:

General Agricultural And Biological Sciences General Biochemistry, Genetics And Molecular Biology General Environmental Science General Immunology And Microbiology General Medicine General Agricultural And Biological Sciences General Biochemistry, Genetics And Molecular Biology General Immunology And Microbiology General Agricultural And Biological Sciences General Biochemistry, Genetics And Molecular Biology General Immunology And Microbiology
Source:

Proceedings of the Royal Society B: Biological Sciences, 289(1986)
DOI:

https://doi.org/10.1098/rspb.2022.1478
ISSN:

0962-8452 ; 1471-2954
Format:

PDF
Publisher:

The Royal Society
Pubmed ID:

36350208
Pubmed Central ID:

PMC9653257
Document Type:

Journal Article
Funding:

Grant no. NA19OAR010303
License:

https://creativecommons.org/licenses/by/4.0/
Rights Information:

CC BY
Compliance:

Library
Main Document Checksum:

urn:sha256:3961c8a532b9e3494a95c8c85fe34903b3c84f3406a3494f38e986e2274352cb
Download URL:

https://repository.library.noaa.gov/view/noaa/58990/noaa_58990_DS1.pdf
File Type:

[PDF - 3.56 MB ]

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