No essential biological role for lutetium is known, and few reports of microbial interactions with lutetium have been published.
Lu3+ has been shown to effectively replace Ca2+ in the activation of
Bacillus subtilis α-amylase
(Smolka et al,
For more information:
Medline for lutetium metabolism AND bacteria
Darnall DW, Birnbaum ER. Lanthanide ions activate a-amylase. Biochem. 1973;12:3489-91.