Cryo-EM structure of the ARISCdC(E33A):K63-Ub7 complex (Left Arm map)

2026-08-26 REL PDBe INITIAL_RELEASE REPOSITORY INITIAL_RELEASE REPOSITORY INITIAL_RELEASE REPOSITORY INITIAL_RELEASE REPOSITORY INITIAL_RELEASE REPOSITORY INITIAL_RELEASE REPOSITORY INITIAL_RELEASE REPOSITORY INITIAL_RELEASE REPOSITORY PDBe PDBe 2025-09-16 2026-08-05 2026-08-05 2026-08-26 Biotechnology and Biological Sciences Research Council (BBSRC) BB/Z51522X/1 United Kingdom Wellcome Trust 222531/Z/21/Z United Kingdom Medical Research Council (MRC, United Kingdom) MR/T029471/1 United Kingdom Wellcome Trust 221524/Z/20/Z United Kingdom Cryo-EM structure of the ARISCdC(E33A):K63-Ub7 complex (Left Arm map) Foglizzo M Degtjarik O Zeqiraj E Deubiquitylating enzymes, JAMM/MPN family, ubiquitin chains, DNA damage repair, HYDROLASE Foglizzo M Datta A Degtjarik O Perera H Liburd J Sykora UM Ganji SR Wildsmith G Chandler F Campbell LJ Calabrese AN Greenberg RA Zeqiraj E Mechanism of K63-linked polyubiquitin recognition and cleavage by the BRCA1-A complex. Nat Commun UK 17 2026 42581301 doi:10.1038/s41467-026-75795-y 2041-1723 EMDB EMD-55080 associated EM volume ARISCdC(E33A) in complex with K63-linked ubiquitin chains ARISCdC(E33A) in complex with K63-linked ubiquitin chains 0 1 2 3 4 5 6 7 8 Homo sapiens 0.148 singleParticle particle 0.8 7.3 25.0 HEPES 2-[4-(2-hydroxyethyl)piperazin-1-yl]ethanesulfonic acid 150.0 NaCl Sodium chloride 1.0 TCEP Tris(2-carboxyethyl)phosphine UltrAuFoil R1.2/1.3 GOLD 300 GLOW DISCHARGE 60 AIR 3.8e-07

UltrAuFoil R1.2/1.3 300-mesh grids (Quantifoil Micro Tools GmbH) were glow-discharged for 1 min at 12 mA and 0.38 mBar pressure using a PELCO easiGlow system (Ted Pella).

ETHANE 100 277 FEI VITROBOT MARK IV

blot force = 1 N; blot time = 6 s; waiting time = 27 s.

Freshly purified ARISCdC(E33A) (at 0.8 mg/mL) was mixed with 1.5-fold molar excess of K63-linked heptaUb (Ub7) chains, and incubated in the presence of 0.025% (v/v) glutaraldehyde (Sigma-Aldrich) at room temperature for 4 min. Cross-linking reactions were then quenched by the addition of 100 mM Tris-HCl pH 7.5 prior to cryo-EM grids preparation.

TFS KRIOS FLOOD BEAM BRIGHT FIELD FIELD EMISSION GUN 300 2.7 0.9 3.0 165000.0 FEI TITAN KRIOS AUTOGRID HOLDER NITROGEN VOLTA PHASE PLATE TFS Selectris 10 TFS FALCON 4i (4k x 4k) 2 55093 3.5 45.5 1 2206570 cryoSPARC v4.5.3 PHASE FLIPPING AND AMPLITUDE CORRECTION

A previously determined 3D volume was used as the startup model

1 C1 3.57 FSC 0.143 CUT-OFF cryoSPARC v4.5.3 100036 MAXIMUM LIKELIHOOD cryoSPARC v4.5.3 MAXIMUM LIKELIHOOD cryoSPARC v4.5.3 4 RELION v4.0 emd_55080.map.gz 1 IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) 400 400 400 0 0 0 400 400 400 296.0 296.0 296.0 90.0 90.0 90.0 X Y Z -0.0018127818 1.9484305 0.0000946427 0.007471451 0.74 0.74 0.74 0.0141 AUTHOR ::::EMDATABANK.org::::EMD-55080:::: emd_55080_msk_1.map emd_55080_additional_1.map.gz 1 IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) 400 400 400 0 0 0 400 400 400 296.0 296.0 296.0 90.0 90.0 90.0 X Y Z -0.38813722 0.6935265 -0.00018966141 0.00435179 0.74 0.74 0.74 AUTHOR ::::EMDATABANK.org::::EMD-55080:::: emd_55080_half_map_1.map.gz 1 IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) 400 400 400 0 0 0 400 400 400 296.0 296.0 296.0 90.0 90.0 90.0 X Y Z -0.5627267 0.82246935 -0.00008057552 0.031649128 0.74 0.74 0.74 AUTHOR ::::EMDATABANK.org::::EMD-55080:::: emd_55080_half_map_2.map.gz 1 IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) 400 400 400 0 0 0 400 400 400 296.0 296.0 296.0 90.0 90.0 90.0 X Y Z -0.45802188 0.79817367 -0.00007941569 0.031467836 0.74 0.74 0.74 AUTHOR ::::EMDATABANK.org::::EMD-55080::::