TY - JOUR
T1 - The interdomain flexible linker of the polypeptide GalNAc transferases dictates their long-range glycosylation preferences
AU - De Las Rivas, Matilde
AU - Lira-Navarrete, Erandi
AU - Daniel, Earnest James Paul
AU - Companõn, Ismael
AU - Coelho, Helena
AU - Diniz, Ana
AU - Jiménez-Barbero, Jesús
AU - Peregrina, Jesús M.
AU - Clausen, Henrik
AU - Corzana, Francisco
AU - Marcelo, Filipa
AU - Jiménez-Osés, Gonzalo
AU - Gerken, Thomas A.
AU - Hurtado-Guerrero, Ramon
N1 - We thank synchrotron radiation sources DLS (Oxford) and in particular beamline I03 (experiment number MX10121-7). We thank ARAID, MEC (CTQ2013-44367-C2-2-P, BFU2016-75633-P, CTQ2015-67727-R, CTQ2015-70524-R, and RYC-2013-14706), the National Institutes of Health (GM113534, and instrument grant GM113534-01S), the Danish National Research Foundation (DNRF107), the FCT-Portugal (UID/Multi/04378/2013 and PTNMR Project No 022161), and the DGA (B89) for the financial support. I.C. thanks Universidad de La Rioja for the FPI grant. F.M. thanks FCT-Portugal for IF Investigator. E.L.-N. acknowledges her postdoctoral EMBO fellowship ALTF 1553-2015 co-funded by the European Commission (LTFCOFUND2013, GA-2013-609409) and Marie Curie Actions. H.C. and J.J.-B. thank EU for the TOLLerant project. The research leading to these results has also received funding from the FP7 (2007-2013) under BioStruct-X (grant agreement No. 283570 and BIOSTRUCTX_5186). We also thank BIFI (Memento cluster) and CESGA for computer support.
PY - 2017/12/5
Y1 - 2017/12/5
N2 - The polypeptide GalNAc-transferases (GalNAc-Ts), that initiate mucin-type O-glycosylation, consist of a catalytic and a lectin domain connected by a flexible linker. In addition to recognizing polypeptide sequence, the GalNAc-Ts exhibit unique long-range N- A nd/or C-terminal prior glycosylation (GalNAc-O-Ser/Thr) preferences modulated by the lectin domain. Here we report studies on GalNAc-T4 that reveal the origins of its unique N-terminal long-range glycopeptide specificity, which is the opposite of GalNAc-T2. The GalNAc-T4 structure bound to a monoglycopeptide shows that the GalNAc-binding site of its lectin domain is rotated relative to the homologous GalNAc-T2 structure, explaining their different long-range preferences. Kinetics and molecular dynamics simulations on several GalNAc-T2 flexible linker constructs show altered remote prior glycosylation preferences, confirming that the flexible linker dictates the rotation of the lectin domain, thus modulating the GalNAc-Ts' long-range preferences. This work for the first time provides the structural basis for the different remote prior glycosylation preferences of the GalNAc-Ts.
AB - The polypeptide GalNAc-transferases (GalNAc-Ts), that initiate mucin-type O-glycosylation, consist of a catalytic and a lectin domain connected by a flexible linker. In addition to recognizing polypeptide sequence, the GalNAc-Ts exhibit unique long-range N- A nd/or C-terminal prior glycosylation (GalNAc-O-Ser/Thr) preferences modulated by the lectin domain. Here we report studies on GalNAc-T4 that reveal the origins of its unique N-terminal long-range glycopeptide specificity, which is the opposite of GalNAc-T2. The GalNAc-T4 structure bound to a monoglycopeptide shows that the GalNAc-binding site of its lectin domain is rotated relative to the homologous GalNAc-T2 structure, explaining their different long-range preferences. Kinetics and molecular dynamics simulations on several GalNAc-T2 flexible linker constructs show altered remote prior glycosylation preferences, confirming that the flexible linker dictates the rotation of the lectin domain, thus modulating the GalNAc-Ts' long-range preferences. This work for the first time provides the structural basis for the different remote prior glycosylation preferences of the GalNAc-Ts.
UR - http://www.scopus.com/inward/record.url?scp=85037122538&partnerID=8YFLogxK
U2 - 10.1038/s41467-017-02006-0
DO - 10.1038/s41467-017-02006-0
M3 - Article
C2 - 29208955
AN - SCOPUS:85037122538
VL - 8
JO - Nature Communications
JF - Nature Communications
SN - 2041-1723
IS - 1
M1 - 1959
ER -