In fungal non-reducing polyketide synthases (NR-PKS) the acyl-carrier protein (ACP) carries the growing polyketide intermediate through iterative rounds of elongation, cyclization and product release. This process occurs through a controlled, yet enigmatic coordination of the ACP with its partner enzymes. The transient nature of ACP interactions with these catalytic domains imposes a major obstacle for investigation of the influence of protein–protein interactions on polyketide product outcome. To further our understanding about how the ACP interacts with the product template (PT) domain that catalyzes polyketide cyclization, we developed the first mechanism-based crosslinkers for NR-PKSs. Through in vitro assays, in silico docking and bioinformatics, ACP residues involved in ACP–PT recognition were identified. We used this information to improve ACP compatibility with non-cognate PT domains, which resulted in the first gain-of-function ACP with improved interactions with its partner enzymes. This advance will aid in future combinatorial biosynthesis of new polyketides.Mechanism-based crosslinkers for non-reducing polyketide synthases were developed and used to identify acyl-carrier protein (ACP) residues involved in ACP–product template (PT) domain recognition. With this information in hand the first gain-of-function ACP with improved interactions with its partner enzymes was developed.
Insulin-like growth factor binding protein-2: NMR analysis and structural characterization of the N-terminal domain
Insulin-like growth factor binding protein-2: NMR analysis and structural characterization of the N-terminal domain
March 2012
Publication year: 2012
Source:Biochimie, Volume 94, Issue 3</br>
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The insulin-like growth factor binding proteins are a family of six proteins (IGFBP-1 to -6) that bind insulin-like growth factors-I and -II (IGF-I/II) with high affinity. In addition to regulating IGF actions, IGFBPs have IGF-independent functions. IGFBP-2, the largest member of this family, is over-expressed in many cancers and has been proposed as a possible target for the...
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Insulin-like growth factor binding protein-2: NMR analysis and structural characterization of the N-terminal domain.
Insulin-like growth factor binding protein-2: NMR analysis and structural characterization of the N-terminal domain.
Insulin-like growth factor binding protein-2: NMR analysis and structural characterization of the N-terminal domain.
Biochimie. 2011 Sep 22;
Authors: Galea CA, Mobli M, McNeil KA, Mulhern TD, Wallace JC, King GF, Forbes BE, Norton RS
Abstract
The insulin-like growth factor binding proteins are a family of six proteins (IGFBP-1 to 6) that bind insulin-like growth factors-I and -II (IGF-I/II) with high affinity. In addition...
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09-30-2011 06:00 AM
Insulin-like growth factor binding protein-2: NMR analysis and structural characterization of the N-terminal domain.
Insulin-like growth factor binding protein-2: NMR analysis and structural characterization of the N-terminal domain.
Insulin-like growth factor binding protein-2: NMR analysis and structural characterization of the N-terminal domain.
Biochimie. 2011 Sep 22;
Authors: Galea CA, Mobli M, McNeil KA, Mulhern TD, Wallace JC, King GF, Forbes BE, Norton RS
Abstract
The insulin-like growth factor binding proteins are a family of six proteins (IGFBP-1 to 6) that bind insulin-like growth factors-I and -II (IGF-I/II) with high affinity. In...
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09-30-2011 05:59 AM
NMR structure of an acyl-carrier protein from Borrelia burgdorferi.
NMR structure of an acyl-carrier protein from Borrelia burgdorferi.
NMR structure of an acyl-carrier protein from Borrelia burgdorferi.
Acta Crystallogr Sect F Struct Biol Cryst Commun. 2011 Sep 1;67(Pt 9):1137-40
Authors: Barnwal RP, Van Voorhis WC, Varani G
Abstract
Nearly complete resonance assignment and the high-resolution NMR structure of the acyl-carrier protein from Borrelia burgdorferi, a target of the Seattle Structural Genomics Center for Infectious Disease (SSGCID) structure-determination pipeline, are reported. This protein...
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09-10-2011 06:51 PM
NMR, biophysical and biochemical studies reveal the minimal calmodulin-binding domain of the HIV-1 matrix protein.
NMR, biophysical and biochemical studies reveal the minimal calmodulin-binding domain of the HIV-1 matrix protein.
NMR, biophysical and biochemical studies reveal the minimal calmodulin-binding domain of the HIV-1 matrix protein.
J Biol Chem. 2011 Jul 28;
Authors: Samal AB, Ghanam RH, Fernandez TF, Monroe EB, Saad JS
Subcellular distribution of Calmodulin (CaM) in human immunodeficiency virus type-1 (HIV-1) infected cells is distinct from that observed in uninfected cells. CaM has been shown to interact and co-localize with the HIV-1 Gag protein...
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07-30-2011 11:23 AM
[NMR paper] Structural analysis of the extracellular domain of vaccinia virus envelope protein, A
Structural analysis of the extracellular domain of vaccinia virus envelope protein, A27L, by NMR and CD spectroscopy.
Related Articles Structural analysis of the extracellular domain of vaccinia virus envelope protein, A27L, by NMR and CD spectroscopy.
J Biol Chem. 2002 Jun 7;277(23):20949-59
Authors: Lin TH, Chia CM, Hsiao JC, Chang W, Ku CC, Hung SC, Tzou DL
This study presents the molecular structure of the extracellular domain of vaccinia virus envelope protein, A27L, determined by NMR and CD spectroscopy. A recombinant protein, eA27L-aa,...
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11-24-2010 08:49 PM
[NMR paper] Refinement of the NMR structures for acyl carrier protein with scalar coupling data.
Refinement of the NMR structures for acyl carrier protein with scalar coupling data.
Related Articles Refinement of the NMR structures for acyl carrier protein with scalar coupling data.
Proteins. 1990;8(4):377-85
Authors: Kim Y, Prestegard JH
Structure determination of small proteins using NMR data is most commonly pursued by combining NOE derived distance constraints with inherent constraints based on chemical bonding. Ideally, one would make use of a variety of experimental observations, not just distance constraints. Here, coupling...
Structural and Biochemical Analysis of Protein–Protein Interactions Between the Acyl-Carrier Protein and Product Template Domain
Linear Mode
