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The function of PTRH2 at mitochondria

ABSTRACT: The integrin effector, PTRH2, associates with mitochondria in adherent cells where its function has not been elucidated. PTRH2 loss-of-function mutations cause multisystem disease in children through an unknown mechanism. We sought to determine the role of mitochondrial PTRH2. We used IP/MS proteomics to identify PTRH2 interacting partners.

INSTRUMENT(S):

ORGANISM(S): Mus Musculus (mouse)

TISSUE(S): Heart, Heart Left Ventricle

SUBMITTER: Jennifer Klein

LAB HEAD: Michelle L. Matter

PROVIDER: PXD064307 | Pride | 2025-12-27

REPOSITORIES: Pride

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			Action	DRS
	23-15MM_3_withStudyFactors.msf	Msf
	23-15MM_4_withStudyFactors_groups.mzML	Mzml
	23-15MM_4_withStudyFactors_groups.mzid	Mzid
	23-15MM_IP1_1ul_100m.raw	Raw
	23-15MM_IP2_1ul_100m.raw	Raw

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Project description:The study aimed to investigate the mechanisms of Jianxin (JX) granules, a Traditional Chinese Medicine formulation, in the treatment of heart failure (HF) using metabolomic profiling. The HF model was established by ligation of left coronary artery. The successfully modeled rats were randomly divided into three groups: the model group, the JX granules group, and Sacubitril/Valsartan (S/V) group. Four weeks after treatment, LV tissue samples were collected. Proteomics was used to identify the differentially expressed proteins and potential pathways. The differential expressed proteins (DEPs) were obtained with Tandem Mass Tags approach. As compared to the control group, 150 DEPs were identified in model rats, comprising 112 up-regulated and 38 down-regulated proteins. Notably, in the JX granules group, 25 DEPs were identified compared to the model rats, encompassing 18 up-regulated and 7 down-regulated proteins. In comparison with the control group, 228 DEPs in the JX granules group were obtained, which comprised of 128 up-regulated and 100 down-regulated proteins. As compared with the control group, BP in the model group was mainly enriched in humoral immune response, positive regulation of apoptotic cell clearance, and the response to metal ions; Meanwhile, CC was mainly related to contractile and stress fibers, actin filaments, and extracellular space; MF was mainly enriched in the serine-type peptidase activity, actin binding, and peptidase activity. Furthermore, DEPs indicated by KEGG analysis were primarily linked to pathways such as the complement and coagulation cascades, regulation of the actin cytoskeleton, and adrenergic signaling. In contrast to the model group, BP in JX granules group was primarily associated with processes involving nucleosome organization, chromatin assembly or disassembly, DNA conformation change and small molecule catabolic processes; CC was primarily related to the protein-DNA complex, mitochondrion, intracellular, nucleosome, cytoplasm; MF displayed significant enrichment in protein dimerization and homodimerization activity, catalase activity, chromatin and nucleosomal DNA binding. Considering KEGG enrichment information, DEPs in the JX granules group were mainly enriched in metabolic pathways and ribosome pathway. The key differential genes, such as triosephosphate isomerase 1 (TPI1), lactate dehydrogenase B (LDHB), pyruvate kinase M (PKM), protein kinase B (Akt), and lactate dehydrogenase A (LDHA) were identified. The vital pathways including carbon metabolism, the PI3K-Akt signaling pathway, pyruvate metabolism, and HIF-1α signaling pathway were obtained.

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The function of PTRH2 at mitochondria

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