Download MendeleyHigh-resolution structural-omics of human liver enzymes.
Su, C.C., Lyu, M., Zhang, Z., Miyagi, M., Huang, W., Taylor, D.J., Yu, E.W.(2023) Cell Rep 42: 112609-112609
- PubMed: 37289586
- DOI: https://doi.org/10.1016/j.celrep.2023.112609
- Primary Citation of Related Structures:
7UZM, 8EKW, 8EKY, 8EM2, 8EMR, 8EMS, 8EMT, 8ENE, 8EOJ, 8EOR - PubMed Abstract:
We applied raw human liver microsome lysate to a holey carbon grid and used cryo-electron microscopy (cryo-EM) to define its composition. From this sample we identified and simultaneously determined high-resolution structural information for ten unique human liver enzymes involved in diverse cellular processes. Notably, we determined the structure of the endoplasmic bifunctional protein H6PD, where the N- and C-terminal domains independently possess glucose-6-phosphate dehydrogenase and 6-phosphogluconolactonase enzymatic activity, respectively. We also obtained the structure of heterodimeric human GANAB, an ER glycoprotein quality-control machinery that contains a catalytic α subunit and a noncatalytic β subunit. In addition, we observed a decameric peroxidase, PRDX4, which directly contacts a disulfide isomerase-related protein, ERp46. Structural data suggest that several glycosylations, bound endogenous compounds, and ions associate with these human liver enzymes. These results highlight the importance of cryo-EM in facilitating the elucidation of human organ proteomics at the atomic level.
Organizational Affiliation:
Department of Pharmacology, Case Western Reserve University School of Medicine, Cleveland, OH 44106, USA.
