Skip to main content

Biomineralization in Geothermal Environments

  • Chapter
  • First Online:
Thermophilic Microbes in Environmental and Industrial Biotechnology

Abstract

Biomineralization is the process in which various organisms internally or externally produce inorganic minerals as biominerals such as bones, teeth, shells, and invertebrate exoskeletons. The magnetites, iron deposits, gold deposits, calcium carbonates, calcium phosphates, and silicates are well-known examples of the ­biominerals. Although silica is the most abundant compound in the earth’s crust and its precipitation is an important geological process in many geothermal environments, it is not useful for microorganisms. Recent research efforts revealed that both inorganic chemical reactions and microbial activity can be implicated in the formation of siliceous deposits. The extremely thermophilic bacteria within the genus Thermus are predominant component in the indigenous microbial community in siliceous deposits formed in pipes and equipment of geothermal power plants, which contributes to the rapid formation of huge siliceous deposits. In vitro examination suggested that Thermus cells induced precipitation of supersaturated amorphous silica during the exponential growth phase. A silica-induced protein (Sip) was isolated from the cell envelope fraction. The amino acid sequence of Sip was similar to that of the solute-binding protein of the Fe3+-binding ABC transporter. Furthermore, Sip promotes silica deposition on the surfaces of cells, after which the silicified outer membrane may serve as a “suit of armor” that confers resistance to peptide antibiotics. Dissolved silica in geothermal hot water may be a significant ­component in the maintenance and survival of microorganisms in nutrient-limited niches. And thus, thermophilic bacteria may use biosilicification for their own survival. This chapter reviews the formation of siliceous deposits by thermophilic bacteria in geothermal environments.

This is a preview of subscription content, log in via an institution to check access.

Access this chapter

Chapter
USD 29.95
Price excludes VAT (USA)
  • Available as PDF
  • Read on any device
  • Instant download
  • Own it forever
eBook
USD 169.00
Price excludes VAT (USA)
  • Available as EPUB and PDF
  • Read on any device
  • Instant download
  • Own it forever
Softcover Book
USD 219.99
Price excludes VAT (USA)
  • Compact, lightweight edition
  • Dispatched in 3 to 5 business days
  • Free shipping worldwide - see info
Hardcover Book
USD 219.99
Price excludes VAT (USA)
  • Durable hardcover edition
  • Dispatched in 3 to 5 business days
  • Free shipping worldwide - see info

Tax calculation will be finalised at checkout

Purchases are for personal use only

Institutional subscriptions

References

Download references

Author information

Authors and Affiliations

Authors

Corresponding author

Correspondence to Katsumi Doi .

Editor information

Editors and Affiliations

Rights and permissions

Reprints and permissions

Copyright information

© 2013 Springer Science+Business Media Dordrecht

About this chapter

Cite this chapter

Doi, K., Fujino, Y. (2013). Biomineralization in Geothermal Environments. In: Satyanarayana, T., Littlechild, J., Kawarabayasi, Y. (eds) Thermophilic Microbes in Environmental and Industrial Biotechnology. Springer, Dordrecht. https://doi.org/10.1007/978-94-007-5899-5_8

Download citation

Publish with us

Policies and ethics