5LHY image
Entry Detail
PDB ID:
5LHY
Keywords:
STRUCTURAL PROTEIN
Title:
PB3 Domain of Human PLK4 (apo)
Biological Source:
Source Organism:
Homo sapiens
Host Organism:
Escherichia coli B
PDB Version:
Deposition Date:
2016-07-13
Release Date:
2017-03-01
Method Details:
Experimental Method:
X-RAY DIFFRACTION
Resolution:
3.31 Å
R-Value Free:
0.29
R-Value Work:
0.26
R-Value Observed:
0.27
Space Group:
P 43 21 2
5LHY validation report
Macromolecular Entities
Protein Blast
Polymer Type:polypeptide(L)
Description:Serine/threonine-protein kinase PLK4
Chain IDs: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, AA (auth: 1), BA (auth: 2), CA (auth: 3), DA (auth: 4), EA (auth: 5), FA (auth: 6), GA (auth: 7), HA (auth: 8), IA (auth: 9), JA (auth: a), KA (auth: b), LA (auth: c), MA (auth: d), NA (auth: e), OA (auth: f), PA (auth: g), QA (auth: h), RA (auth: i), SA (auth: j), TA (auth: k), UA (auth: l), VA (auth: m), WA (auth: n), XA (auth: o), YA (auth: p), ZA (auth: q), AB (auth: r), BB (auth: s), CB (auth: t), DB (auth: u), EB (auth: v), FB (auth: w), GB (auth: x), HB (auth: y)
Chain Length:91
Number of Molecules:60
Biological Source:Homo sapiens
UniProt ID:O00444 EC:2.7.11.21
Ligand Molecules
NA
Primary Citation
A key centriole assembly interaction interface between human PLK4 and STIL appears to not be conserved in flies.
Biol Open 6 381 389 (2017)
PMID: 28202467 DOI: 10.1242/bio.024661

Abstact

A small number of proteins form a conserved pathway of centriole duplication. In humans and flies, the binding of PLK4/Sak to STIL/Ana2 initiates daughter centriole assembly. In humans, this interaction is mediated by an interaction between the Polo-Box-3 (PB3) domain of PLK4 and the coiled-coil domain of STIL (HsCCD). We showed previously that the Drosophila Ana2 coiled-coil domain (DmCCD) is essential for centriole assembly, but it forms a tight parallel tetramer in vitro that likely precludes an interaction with PB3. Here, we show that the isolated HsCCD and HsPB3 domains form a mixture of homo-multimers in vitro, but these readily dissociate when mixed to form the previously described 1:1 HsCCD:HsPB3 complex. In contrast, although Drosophila PB3 (DmPB3) adopts a canonical polo-box fold, it does not detectably interact with DmCCD in vitro Thus, surprisingly, a key centriole assembly interaction interface appears to differ between humans and flies.

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Primary Citation of related structures
5LHY