- PhD, All India Institute of Medical Sciences, 2004
- Brooks C, Murphy J, Belcastro M, Heller, D, Kolandaivelu S, Sokolov M (2018). Farnesylation of the transducin G protein gamma subunit is a prerequisite for its ciliary targeting in rod photoreceptors. Front Mol Neurosci, 11:16. PMCID: PMC5787109
Wen-Tao Deng, Saravanan Kolandaivelu, Astra Dinculescu, Jie Li, Ping Zhu, Vince A. Chioda, Visvanathan Ramamurthy and William Hauswirth (2018). Cone Phosphodiesterase-6γ’ Subunit Augments Cone PDE6 Holoenzyme Assembly and Stability in a Mouse Model Lacking Both Rod and Cone PDE6 Catalytic Subunits. Front. Mol. Neurosci. doi: 10.3389/fnmol.2018.00233 June 2018
- Murphy J, Kolandaivelu S (2016). Palmitoylation of progressive rod-cone degeneration (PRCD) regulates protein stability and localization.. J Biol Chem, 291(44):23036-23046. PMCID: PMC5087724
- CHristiansen JR, Pendse ND, Kolandaivelu S, Bergo MO, Young SG, Ramamurthy V (2016). Deficiency of isoprenylcysteine carboxyl methyltransferase (ICMT) leads to progressive loss of photoreceptor function. J Neurosci, 36(18):5107-14. PMCID: PMC4854971
- Murphy D, Kolandaivelu S, Ramamurthy, V, Stoilov P (2016). Analysis of alternative pre-RNA splicing in the mouse retina using a fluorescent reporter . Methods Mol Biol, 1421:269-86.
- Murphy D, Singh R, Kolandaivelu S, Ramamurthy V, Stoilov P (2015). Alternative splicing shapes the phenotype of a mutation in BBS8 to cause nonsyndromic retinitis pigmentosa. Mol Cell Biol, 35(10):1860-70. PMCID: PMC4405636
- Singh RK, Kolandaivelu S, Ramamurthy V (2014). Early alteration of retinal neurons in Aipl1-/- animals. Invest Ophthalmol Vis Sci, 55(5):3081-92. PMCID: PMC4034756
- Kolandaivelu S, Ramamurthy V (2014). AIPL1 protein and its indispensable role in cone photoreceptor function and survival. Adv Exp Med Biol, 801:43-8.
- Kolandaivelu S, Singh RK, Ramamurthy V (2014). AIPL1, a protein linked to blindness, is essential for the stability of enzymes mediating cGMP metabolism in cone photoreceptor cells. Hum Mol Genet, 23(4):1002-12. PMCID: PMC3900108
- Deng WT, Sakurai K, Kolandaivelu S, Kolesnikov AV, Dinculescu A, LiJ, Zhu P, Liu X, Pang J, Chiodo VA, Boye SL, Chang B, Ramamurthy V, Kefalov VJ, Hauswirth WW (2013). Cone phosphodiesterase-6α' restores rod function and confers distinct physiological properties in the rod phosphodiesterase-6β-deficient rd10 mouse. J Neurosci, 33(29):11745-53. PMCID: PMC3713718
- Majumder A, Pahlberg J, Boyd KK, Kerov V, Kolandaivelu S, Ramamurthy V, Sampath AP, Artemyev NO (2013).Transducin translocation contributes to rod survival and enhances synaptic transmission from rods to biopolar cells.Proc Natl Acad Sci USA, 110(30:12468-73. PMCID: PMC3725049
- Kolandaivelu S, Chang B, Ramamurthy V (2011). Rod phosphodiesterase-6 (PDE6) catalytic subunits restore cone function in a mouse model lacking cone PDE6 catalytic subunit. J Biol Chem, 286(38):33252-9. PMCID: PMC3190866
- Christiansen JR, Kolandaivelu S, Bergo MO, Ramamurthy V (2011). RAS-converting enzyme 1-mediated endoproteolysis is required for trafficking of rod phosphodiesterase 6 to photoreceptor outer segments.Proc Natl Acad Sci USA, 108(21):8862-6. PMCID: PMC3102416
My work has been honored and selected for an oral presentation. In addition, I have been selected for FASEB travel grant award. Title: “Post-Prenylation Processing (PPP) of proteins is needed for robust cone photo response”. FASEB (Biology and Chemistry of Vision), July 2013, Steamboat Springs, Colorado (USA).
- Blinding diseases
- Studying retinal photoreceptor cells biogenesis, function, and maintenance
- Importance of post-translational lipid modification in retinal function
- Understanding the importance of Na, K-ATPase in retinal function and stability
- Investigate the role of NMNAT1 in retinal function
Description of Research
The focus of Kolandaivelu laboratory research is to identify the mechanism behind biogenesis and/or maintenance in the photoreceptor outer segment. Photoreceptor outer segments are modified cilia filled with highly ordered membrane discs that harbor signaling proteins responsible for the detection of photons. It is very puzzling to understand how the photoreceptor OS is maintained and disc membranes are organized and stacked together, which is fundamental for proper function and stability of photoreceptor neurons. Using a combination of physiological, biochemical and molecular multi-disciplinary approaches, including gene editing, animal models, and tissues culture, we strive to understand our long term goal the mechanism behind biogenesis and/or maintenance in the photoreceptor outer segment.
Additionally, our lab studies the importance of the post-translational lipid modification “palmitoylation” in retinal proteins associated with blinding diseases. Among lipid modifications, palmitoylation is the only reversible lipid modification. The dynamic reversibility controls many cellular functions including protein trafficking, protein stability, and protein-protein interaction. We will apply our knowledge of these regulatory pathways in retinal function to develop a novel therapeutic approach.
Furthermore, using relevant animal models we study the importance of membrane potential in retinal function and stability. In retinal photoreceptor neurons, Na, K-ATPase is an important enzyme that maintain the intracellular Na+, and K+ levels. In neurons, Na, K-ATPase pump utilizes the 2/3rd of the energy to maintain their function and survival. Interestingly, we identified “beta units” (ATP1β2) in Na, K-ATPase is post-translationally lipid modified by palmitoylation. However, we do not know the importance of palmitoyl lipid modification and precise role of Na, K-ATPase in retinal function. Therefore, we focused to understand the importance of Na, K-ATPase and palmitoylation in beta subunits (ATP1β2) using specific animal models and biochemistry, physiology, molecular and gene therapy approaches.
Also, our lab study to understand role of NMNAT1, an enzyme associated with a severe blinding diseases “Leber Congenital Amaurosis” (LCA). Using conditional and transgenic animal models, we investigate the molecular mechanism behind NMNAT1 in retinal function.
a) Understanding mechanism behind biogenesis and/ or maintenance of photoreceptor outer segments.
b) Study the importance of membrane potential in photoreceptor stability and function.
c) Identification of retinal palmitoyl lipid modified proteins and its role.
d) Understanding the role of the NAD-biosynthetic enzyme NMNAT1 in retinal function and stability.
Current Lab members:
Ms. Emily Sechrest, Graduate Student
Ms. Sree Indrani Motipally, Graduate Student
Mr. David Sokolov, Undergraduate honors student
Mr. Connor Nevin, Undergarduate honors student
Ms. Gabrielle Hamner, Biology Technician/ Lab Manager