NANARCHAEUM EQUITANS E IGNICOCCUS HOSPITALIS

NANARCHAEUM EQUITANS E IGNICOCCUS HOSPITALIS

1. is the first and only known association of two archea

   • during exponential growth
     • is occupied by 25%
   • during stationary phase
     • is occupied by 80-90%

2. N.equitans

   • is anaerobic hyperthermophilic coccus
     • its cells lack S layer
       • and has an outer membrane with an unique protein and lipid composition
     • growing
       • chemolithoatotrophically by reductionof sulfur with H2 as electron donor
   • is the symbiont
     • in cultive growth curve is bigger

3. I. hospitalis

   • is the first representative of phylum nanoarcheota
   • it cells are
     • small coccus with a diameter of 300-500 nm
     • attatched to the surfaces of N. equitans
   • has one of the smallest genomes know
   • lack genes that biosynthesizes lipids, cofactors, amino acids or nucleotides
   • is the host
     • in cultive occupied archeas are not capable of division
       • optimal growth conditions
         • 90°C
         • 1.4% NaCI
         • PH 5.5-6