PDBsum entry 6hv7

Hydrolase

PDB id: 6hv7

Contents

Protein chains

250 a.a.

244 a.a.

240 a.a.

235 a.a.

231 a.a.

243 a.a.

241 a.a.

226 a.a.

204 a.a.

195 a.a.

212 a.a.

222 a.a.

233 a.a.

196 a.a.

Ligands

GQQ ×4

Metals

_CL ×2

_MG ×8

PDB id:

6hv7

Name:

Hydrolase

Title:

Yeast 20s proteasome with human beta2i (1-53) in complex with 7

Structure:

Proteasome subunit alpha type-2. Chain: a, o. Synonym: macropain subunit y7,multicatalytic endopeptidase complex subunit y7,proteasome component y7,proteinase ysce subunit 7. Proteasome subunit alpha type-3. Chain: b, p. Synonym: macropain subunit y13,multicatalytic endopeptidase complex subunit y13,proteasome component y13,proteinase ysce subunit 13. Proteasome subunit alpha type-4.

Source:

Saccharomyces cerevisiae (strain atcc 204508 / s288c). Baker's yeast. Organism_taxid: 559292. Homo sapiens, saccharomyces cerevisiae (strain atcc 204508 / s288c). Human, baker's yeast. Organism_taxid: 9606, 559292. Gene: psmb10, lmp10, mecl1, pup1, yor157c.

Resolution:

3.40Å R-factor: 0.176 R-free: 0.229

Authors:

E.M.Huber,M.Groll

Key ref:

B.T.Xin et al. (2019). Structure-Based Design of Inhibitors Selective for Human Proteasome β2c or β2i Subunits. J Med Chem, 62, 1626-1642. PubMed id: 30657666 DOI: 10.1021/acs.jmedchem.8b01884

Date:

10-Oct-18 Release date: 30-Jan-19

Protein chains

P23639  (PSA2_YEAST) -  Proteasome subunit alpha type-2 from Saccharomyces cerevisiae (strain ATCC 204508 / S288c)

Seq: 250 a.a.

Struc: 250 a.a.

Protein chains

P23638  (PSA3_YEAST) -  Proteasome subunit alpha type-3 from Saccharomyces cerevisiae (strain ATCC 204508 / S288c)

Seq: 258 a.a.

Struc: 244 a.a.

Protein chains

P40303  (PSA4_YEAST) -  Proteasome subunit alpha type-4 from Saccharomyces cerevisiae (strain ATCC 204508 / S288c)

Seq: 254 a.a.

Struc: 240 a.a.

Protein chains

P32379  (PSA5_YEAST) -  Proteasome subunit alpha type-5 from Saccharomyces cerevisiae (strain ATCC 204508 / S288c)

Seq: 260 a.a.

Struc: 235 a.a.

Protein chains

P40302  (PSA6_YEAST) -  Proteasome subunit alpha type-6 from Saccharomyces cerevisiae (strain ATCC 204508 / S288c)

Seq: 234 a.a.

Struc: 231 a.a.

Protein chains

P21242  (PSA7_YEAST) -  Probable proteasome subunit alpha type-7 from Saccharomyces cerevisiae (strain ATCC 204508 / S288c)

Seq: 288 a.a.

Struc: 243 a.a.

Protein chains

P21243  (PSA1_YEAST) -  Proteasome subunit alpha type-1 from Saccharomyces cerevisiae (strain ATCC 204508 / S288c)

Seq: 252 a.a.

Struc: 241 a.a.

Protein chains

P25043  (PSB2_YEAST) -  Proteasome subunit beta type-2 from Saccharomyces cerevisiae (strain ATCC 204508 / S288c)

Seq: 261 a.a.

Struc: 226 a.a.*

Protein chains

P40306  (PSB10_HUMAN) -  Proteasome subunit beta type-10 from Homo sapiens

Seq: 273 a.a.

Struc: 226 a.a.*

Protein chains

P25451  (PSB3_YEAST) -  Proteasome subunit beta type-3 from Saccharomyces cerevisiae (strain ATCC 204508 / S288c)

Seq: 205 a.a.

Struc: 204 a.a.

Protein chains

P22141  (PSB4_YEAST) -  Proteasome subunit beta type-4 from Saccharomyces cerevisiae (strain ATCC 204508 / S288c)

Seq: 198 a.a.

Struc: 195 a.a.

Protein chains

P30656  (PSB5_YEAST) -  Proteasome subunit beta type-5 from Saccharomyces cerevisiae (strain ATCC 204508 / S288c)

Seq: 287 a.a.

Struc: 212 a.a.

Protein chains

P23724  (PSB6_YEAST) -  Proteasome subunit beta type-6 from Saccharomyces cerevisiae (strain ATCC 204508 / S288c)

Seq: 241 a.a.

Struc: 222 a.a.

Protein chains

P30657  (PSB7_YEAST) -  Proteasome subunit beta type-7 from Saccharomyces cerevisiae (strain ATCC 204508 / S288c)

Seq: 266 a.a.

Struc: 233 a.a.

Protein chains

P38624  (PSB1_YEAST) -  Proteasome subunit beta type-1 from Saccharomyces cerevisiae (strain ATCC 204508 / S288c)

Seq: 215 a.a.

Struc: 196 a.a.

* PDB and UniProt seqs differ at 119 residue positions (black crosses)

Enzyme reactions

• Enzyme class: Chains A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T, U, V, W, X, Y, Z, a, b: E.C.3.4.25.1 - proteasome endopeptidase complex.
• Reaction: Cleavage at peptide bonds with very broad specificity.

DOI no: 10.1021/acs.jmedchem.8b01884

J Med Chem 62:1626-1642 (2019)

PubMed id: 30657666

Structure-Based Design of Inhibitors Selective for Human Proteasome β2c or β2i Subunits.

B.T.Xin, E.M.Huber, G.de Bruin, W.Heinemeyer, E.Maurits, C.Espinal, Y.Du, M.Janssens, E.S.Weyburne, A.F.Kisselev, B.I.Florea, C.Driessen, G.A.van der Marel, M.Groll, H.S.Overkleeft.

ABSTRACT

Subunit-selective proteasome inhibitors are valuable tools to assess the biological and medicinal relevance of individual proteasome active sites. Whereas the inhibitors for the β1c, β1i, β5c, and β5i subunits exploit the differences in the substrate-binding channels identified by X-ray crystallography, compounds selectively targeting β2c or β2i could not yet be rationally designed because of the high structural similarity of these two subunits. Here, we report the development, chemical synthesis, and biological screening of a compound library that led to the identification of the β2c- and β2i-selective compounds LU-002c (4; IC₅₀ β2c: 8 nM, IC₅₀ β2i/β2c: 40-fold) and LU-002i (5; IC₅₀ β2i: 220 nM, IC₅₀ β2c/β2i: 45-fold), respectively. Co-crystal structures with β2 humanized yeast proteasomes visualize protein-ligand interactions crucial for subunit specificity. Altogether, organic syntheses, activity-based protein profiling, yeast mutagenesis, and structural biology allowed us to decipher significant differences of β2 substrate-binding channels and to complete the set of subunit-selective proteasome inhibitors.