Heliobacterium modesticaldum Ice1

Names Heliobacterium modesticaldum Ice1
Accession numbers NC_010337
Background Heliobacteria are the only photosynthetic Firmicutes. They are unique in using bacteriochlorophyll g as their major antennae pigment and an oxidized form of chlorophyll a, 8(1)-hydroxy-Chla as the primary electron acceptor for a type I reaction center (RC, related to photosytem I of oxygenic organisms). Unlike other anoxygenic bacteria they do not have any bacteriochlorophyll-containing internal membranes; pigments are found associated with RCs in the cell membrane. They also have unique carotenoids. Although photosynthetic they are obligatorily heterotrophic, as they have only a limited capacity for carbon metabolism, however they are capable of nitrogen fixation. Heliobacteria are capable of sporulation, although it occurs only rarely in pure cultures. Heliobacterium modesticaldum strain Ice1, the type strain of this species, was isolated from Icelandic hot spring volcanic soils. It grows optimally above 50 degrees Celsius, grows best photoheterotrophically, but can grow in the dark chemotrophically on pyruvate. (HAMAP: HELMI)
Strain Ice1
Complete Yes
Sequencing centre (01-APR-2008) Pharmaceutical Genomics Division, Translational Genomics Research Institute, 13208 E Shea Blvd,
(13-AUG-2009) National Center for Biotechnology Information, NIH, Bethesda, MD 20894, USA
(24-JAN-2008) Pharmaceutical Genomics Division, Translational Genomics Research Institute, 13208 E Shea Blvd,
Sequencing quality Level 6: Finished
Sequencing depth NA
Sequencing method NA
Isolation site hot spring microbial mats and volcanic soil in Iceland
Isolation country Iceland
Number of replicons 1
Gram staining properties Negative
Shape Bacilli
Mobility Yes
Flagellar presence Yes
Number of membranes 1
Oxygen requirements Anaerobic
Optimal temperature 50.0
Temperature range Thermophilic
Habitat Multiple
Biotic relationship Free living
Host name NA
Cell arrangement NA
Sporulation Sporulating
Metabolism NA
Energy source Photosynthetic, Phototroph
Diseases NA
Pathogenicity No