PMID- 37391416 OWN - NLM STAT- MEDLINE DCOM- 20230703 LR - 20231117 IS - 2041-1723 (Electronic) IS - 2041-1723 (Linking) VI - 14 IP - 1 DP - 2023 Jun 30 TI - Targeted cross-linker delivery for the in situ mapping of protein conformations and interactions in mitochondria. PG - 3882 LID - 10.1038/s41467-023-39485-3 [doi] LID - 3882 AB - Current methods for intracellular protein analysis mostly require the separation of specific organelles or changes to the intracellular environment. However, the functions of proteins are determined by their native microenvironment as they usually form complexes with ions, nucleic acids, and other proteins. Here, we show a method for in situ cross-linking and analysis of mitochondrial proteins in living cells. By using the poly(lactic-co-glycolic acid) (PLGA) nanoparticles functionalized with dimethyldioctadecylammonium bromide (DDAB) to deliver protein cross-linkers into mitochondria, we subsequently analyze the cross-linked proteins using mass spectrometry. With this method, we identify a total of 74 pairs of protein-protein interactions that do not exist in the STRING database. Interestingly, our data on mitochondrial respiratory chain proteins ( ~ 94%) are also consistent with the experimental or predicted structural analysis of these proteins. Thus, we provide a promising technology platform for in situ defining protein analysis in cellular organelles under their native microenvironment. CI - (c) 2023. The Author(s). FAU - Chen, Yuwan AU - Chen Y AUID- ORCID: 0000-0002-0844-1762 AD - CAS Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China. AD - University of Chinese Academy of Sciences, Beijing, 100049, China. FAU - Zhou, Wen AU - Zhou W AD - CAS Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China. AD - University of Chinese Academy of Sciences, Beijing, 100049, China. FAU - Xia, Yufei AU - Xia Y AUID- ORCID: 0000-0003-1215-6128 AD - State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, China. FAU - Zhang, Weijie AU - Zhang W AUID- ORCID: 0000-0001-5720-3130 AD - CAS Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China. AD - University of Chinese Academy of Sciences, Beijing, 100049, China. FAU - Zhao, Qun AU - Zhao Q AD - CAS Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China. FAU - Li, Xinwei AU - Li X AD - CAS Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China. AD - Zhang Dayu School of Chemistry, Dalian University of Technology, Dalian, 116024, China. FAU - Gao, Hang AU - Gao H AD - CAS Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China. AD - University of Chinese Academy of Sciences, Beijing, 100049, China. FAU - Liang, Zhen AU - Liang Z AD - CAS Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China. FAU - Ma, Guanghui AU - Ma G AUID- ORCID: 0000-0001-9154-5556 AD - State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, China. FAU - Yang, Kaiguang AU - Yang K AUID- ORCID: 0000-0001-9544-2714 AD - CAS Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China. yangkaiguang@dicp.ac.cn. FAU - Zhang, Lihua AU - Zhang L AUID- ORCID: 0000-0003-3798-2047 AD - CAS Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China. lihuazhang@dicp.ac.cn. FAU - Zhang, Yukui AU - Zhang Y AD - CAS Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China. LA - eng SI - figshare/10.6084/m9.figshare.23261618 PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20230630 PL - England TA - Nat Commun JT - Nature communications JID - 101528555 RN - 0 (Glycols) SB - IM MH - *Mitochondria MH - Protein Conformation MH - *Mitochondrial Membranes MH - Databases, Factual MH - Glycols PMC - PMC10313818 COIS- The authors declare no competing interests. EDAT- 2023/07/01 11:41 MHDA- 2023/07/03 06:41 PMCR- 2023/06/30 CRDT- 2023/06/30 23:16 PHST- 2022/06/15 00:00 [received] PHST- 2023/06/15 00:00 [accepted] PHST- 2023/07/03 06:41 [medline] PHST- 2023/07/01 11:41 [pubmed] PHST- 2023/06/30 23:16 [entrez] PHST- 2023/06/30 00:00 [pmc-release] AID - 10.1038/s41467-023-39485-3 [pii] AID - 39485 [pii] AID - 10.1038/s41467-023-39485-3 [doi] PST - epublish SO - Nat Commun. 2023 Jun 30;14(1):3882. doi: 10.1038/s41467-023-39485-3.