2023
DOI: 10.1101/2023.11.20.567917
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Structural and mechanistic insights into disease-associated endolysosomal exonucleases PLD3 and PLD4

Meng Yuan,
Linghang Peng,
Deli Huang
et al.

Abstract: Endolysosomal exonucleases PLD3 and PLD4 (phospholipases D3 and D4) are associated with autoinflammatory and autoimmune diseases. We report structures of these enzymes, and the molecular basis of their catalysis. The structures reveal an intra-chain dimer topology forming a basic active site at the interface. Like other PLD superfamily members, PLD3 and PLD4 carry HxKxxxxD/E motifs and participate in phosphodiester-bond cleavage. The enzymes digest ssDNA and ssRNA in a 5′-to-3′ manner and are blocked by 5′-pho… Show more

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