Updated project metadata. Leishmania infantum is the causative agent of visceral leishmaniasis in Latin America, a lethal disease if misdiagnosed or left untreated. The ubiquitin proteasome system (UPS) is the main regulator of intracellular proteolysis in eukaryotes and is required for parasite's to life cycle and infection. E3 ubiquitin ligases play important role in UPS and Cullin-1-RING ligases (CRL1) are the largest and most researched family of E3 in eukaryotes. CRL1 complex is made up of SKP1, Cullin1, RBX1, and F-box proteins. This complex is poorly studied in Leishmania. We investigated the interactome of CRL1 complex in L. infantum combining in vitro and in cellulo experiments to identify the interactome of Cullin1 and SKP1 through affinity purification followed by mass spectrometry analysis.