Sequence alignment between 4z3w(E) and UniProt seq Q39TV9 (Q39TV9_GEOMG):

Q39TV9 (Q39TV9_GEOMG): Iron-sulfur cluster-binding oxidoreductase, putative benzoyl-CoA reductase electron transfer protein from Geobacter metallireducens (strain ATCC 53774 / DSM 7210 / GS-15) 
                 10        20        30        40        50        60        70        80        90       100       110       120       130       140       150       160       170         
         ---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------
UniProt: MNSETKKRIVKTINIDADKCNGCRACEVICSAFHAMPPYSSNNPARSRVRVVRDPLRDIYVPLYAGEYTESECIGRDKFIIDGKEYDECGFCRASCPSRDLFREPDSGLPLKCDLCDGEPEPLCVKWCLVGALSVTEREVEEPDESVKRTEMEIGLESLISRFGADVVADTVEQLTKKR
         ...............................................................................................................................................XXXXX...............................
PDB seq: ------KRIVKTINIDADKCNGCRACEVICSAFHAMPPYSSNNPARSRVRVVRDPLRDIYVPLYAGEYTESECIGRDKFIIDGKEYDECGFCRASCPSRDLFREPDSGLPLKCDLCDGEPEPLCVKWCLVGALSVTEREVEEP-----RTEMEIGLESLISRFGADVVADTVEQ-----
               ---+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---     -+---------+---------+----     
                 10        20        30        40        50        60        70        80        90       100       110       120       130       140       150       160       170