Title Istraživanje veznih mjesta za natrij u transporterima: NLS1 paradigma
Title (english) Exploring the sodium binding site in trasporters: the NLS1 paradigm
Author Luana Camlić
Mentor Alex Perálvarez-Márin (mentor)
Mentor Željko Svedružić (mentor)
Committee member Karlo Wittine (predsjednik povjerenstva)
Committee member Nicholas Bradshaw (član povjerenstva)
Committee member Željko Svedružić (član povjerenstva)
Granter University of Rijeka (Faculty of Biotechnology and Drug Development) Rijeka
Defense date and country 2018-10-12, Croatia
Scientific / art field, discipline and subdiscipline BIOTECHNICAL SCIENCES Biotechnology
Abstract Major facilitator superfamily domain containing 2A (MFSD2A) gene encodes for a sodium-dependent lysophosphatidylcholine transporter, NLS1. It is essential for importing of fatty acids, like docosahexaenoic acid (DHA), into human brain [1]. Importing of DHA, is essential for normal human brain growth and cognitive function. Also, NLS1 is involved in microcephaly, a condition characterized by a smaller cerebral cortex, where brain weight is reduced. Because exact structure of NLS1 is still unknown, our research could help to get the insight into the molecular mechanism of NLS1.
In this research we constructed a tridimensional model for hNLS1 using sequences of two proteins, melibiose and NLS1. Using computational biology tools, we were able to build and analyze protein, especially at the sodium binding site level. The apo NLS1 (without sodium in the binding site) allowed the binding of three different sodium ions during a 300 ns all atom molecular dynamics (MD) simulation. The sodium-bound MD simulation with a sodium placed between Asp 93 and Asp 97 (named Asp67 and Asp71 in this work) remained stable throughout the 300 ns simulation.
Root Mean Square Deviation values of equilibration and production show that molecule has stabilized with time. Using Visual Molecular Dynamics (VMD) and the Bendix algorithm we were able to represent helical torsions and bending of specific helices derived from the MD simulation. To speed up the analysis of results we used the R-based Bio3D suite, which allowed us to get RMSD, PCA, DCCM and RMSF plots.
Using computational biology tools, we have been able to validate the sodium binding site in NLS1. This study yields a robust three-dimensional model, which satisfies, so far, the experimental data available on NLS1. In structural biology, this model is a very useful tool to design mutants for
NLS1 in order to obtain a three-dimensional structure of a functional protein.
Abstract (croatian) Glavna domena facilitatora superfamilije koja sadrži 2A (MFSD2A) gen kodira za natrij-ovisni lizofosfatidilkolinski transporter, NLS1. Važan je za unos masnih kiselina, poput doksosaheksaenoične kiseline (DHA), u ljudski mozak [1]. Unos DHA je neophodno za normalan rast i kognitivnu funkciju ljudskog mozga. Također, NLS1 je uključen u mikrocefaliju, stanje karakterizirano manjim cerebralnim korteksom, smanjenom masom mozga. Budući da je točna struktura NLS1 još uvijek nepoznata, naše istraživanje moglo bi pomoći da dobijete uvid u molekularni mehanizam NLS1.
U ovom istraživanju napravili smo trodimenzionalni model hNLS1 pomoću sekvenci dvaju proteina, melibiose i NLS1. Pomoću računalnih bioloških alata uspjeli smo izgraditi i analizirati bjelančevine, osobito na razini veznog mjesta za natrij. Apo NLS1 (bez natrija u veznom mjestu) omogućilo je vezanje tri različita iona natrija tijekom all atom simulacije molekularne dinamike (MD) u trajanju od 300 ns. Natrij-veznom MD simulacijom s natrijem postavljenim između Asp 93 i Asp 97 (nazvano Asp67 i Asp71 u ovom radu) ostao je stabilan kroz simulaciju od 300 ns.
RMSD, odstupanje vrijednosti ekvilibriranja i produkcije, pokazuje da se molekula stabilizira s vremenom. Pomoću VMDa i Bendix algoritma uspjeli smo prikazati spiralne torzije i savijanje specifičnih heliksa izvedenih iz MD simulacije. Da bismo ubrzali analizu rezultata koristili smo R-based Bio3D paket, koji nam je omogućio da dobijemo RMSD, PCA, DCCM i RMSF grafove.
Pomoću računalnih bioloških alata uspjeli smo provjeriti vezno mjesto natrija u NLS1. Ova studija daje robusni trodimenzionalni model koji zadovoljava do sada eksperimentalne podatke dostupne o NLS1. U strukturnoj biologiji, ovaj model je vrlo koristan alat za dizajniranje mutanata za NLS1 kako bi se dobila trodimenzionalna struktura funkcionalnog proteina.
Keywords
NLS1
sodium binding site
melibiose
transporter
MD
Keywords (croatian)
NLS1
vezno mjesto za natrij
melibioza
transporter
MD
Language english
URN:NBN urn:nbn:hr:193:859924
Study programme Title: Medicinal chemistry Study programme type: university Study level: graduate Academic / professional title: magistar/magistra medicinske kemije (magistar/magistra medicinske kemije)
Type of resource Text
File origin Born digital
Access conditions Closed access
Terms of use
Created on 2018-11-06 08:26:35