ISDA

Deposition Date 2020-11-10

Release Date 2021-12-15

Last Version Date 2024-07-10

Entry Detail

PDB ID:

7AXQ

Keywords:

TRANSFERASE

Title:

Structure of the cryo-trapped WDR5:CS-VIP8 cocrystal after illumination at 405 nm and 180 K

Biological Source:

Source Organism:

Homo sapiens (Taxon ID: 9606)

Host Organism:

Escherichia coli BL21

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

1.56 Å

R-Value Free:

0.20

R-Value Work:

0.16

R-Value Observed:

0.16

Space Group:

P 21 21 21

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Macromolecular Entities

Protein Blast

Polymer Type:polypeptide(L)
Molecule:WD repeat-containing protein 5
Gene (Uniprot):WDR5
Chain IDs:A
Chain Length:334
Number of Molecules:1
Biological Source:Homo sapiens

UniProt ID:P61964 Pfam ID:PF00400

Polymer Type:polypeptide(L)
Molecule:CS-VIP8
Chain IDs:B (auth: C)
Chain Length:7
Number of Molecules:1
Biological Source:Homo sapiens

Primary Citation

Bistable Photoswitch Allows in Vivo Control of Hematopoiesis.

Albert, L, Nagpal, J, Steinchen, W, Zhang, L, Werel, L, Djokovic, N, Ruzic, D, Hoffarth, M, Xu, J, Kaspareit, J, Abendroth, F, Royant, A, Bange, G, Nikolic, K, Ryu, S, Dou, Y, Essen, L.O, Vazquez, O.Show

Acs Cent.Sci. 8 57 66 (2022)

PMID: 35106373 DOI: 10.1021/acscentsci.1c00434

Abstact

Optical control has enabled functional modulation in cell culture with unparalleled spatiotemporal resolution. However, current tools for in vivo manipulation are scarce. Here, we design and implement a genuine on-off optochemical probe capable of achieving hematopoietic control in zebrafish. Our photopharmacological approach first developed conformationally strained visible light photoswitches (CS-VIPs) as inhibitors of the histone methyltransferase MLL1 (KMT2A). In blood homeostasis MLL1 plays a crucial yet controversial role. CS-VIP 8 optimally fulfils the requirements of a true bistable functional system in vivo under visible-light irradiation, and with unprecedented stability. These properties are exemplified via hematopoiesis photoinhibition with a single isomer in zebrafish. The present interdisciplinary study uncovers the mechanism of action of CS-VIPs. Upon WDR5 binding, CS-VIP 8 causes MLL1 release with concomitant allosteric rearrangements in the WDR5/RbBP5 interface. Since our tool provides on-demand reversible control without genetic intervention or continuous irradiation, it will foster hematopathology and epigenetic investigations. Furthermore, our workflow will enable exquisite photocontrol over other targets inhibited by macrocycles.

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