Gram-negative bacteria use heme import systems to sequester heme from their environment. The structure of the ABC transporter HmuUV, the heme importer from Yersinia pestis, in the nucleotide-free, apo state was determined, revealing an outward-facing conformation for the transporter.
- Jae-Sung Woo
- Antra Zeltina
- Kaspar P Locher
