Quantifiable fluorescent glycan microarrays.
A glycan microarray was developed by using 2,6-diaminopyridine (DAP) as a fluorescent linker and printing of the glycan-DAP conjugates (GDAPs) on epoxy-activated glass slides. Importantly, all coupled GDAPs showed a detectable level of concentration-dependent GDAP fluorescence under blue laser excitation (495 nm) that can be used for both grid location and on-slide quantification. A glycan array including a large number of GDAP's derived from natural and commercially available free glycans was constructed and glycan interactions with various plant lectins were investigated. In addition, binding parameters of lectins to glycans were obtained by varying both the amount of GDAPs on the array and the lectin concentration in analyses. These data demonstrate the general utility of GDAP microarrays for functional glycomic analyses and for determining binding parameters of glycan binding proteins (GBPs).
Song
Xuezheng
X
Department of Biochemistry, Emory University School of Medicine, O. Wayne Rollins Research Center, 1510 Clifton Road, Suite 4001, Atlanta, GA 30322, USA.
Xia
Baoyun
B
Lasanajak
Yi
Y
Smith
David F
DF
Cummings
Richard D
RD
D054794:Glycomics / Q000379:methods*; D037102:Lectins / Q000737:chemistry; D046228:Microarray Analysis / Q000379:methods*; D015394:Molecular Structure; D011134:Polysaccharides / Q000032:analysis* / Q000737:chemistry; D011725:Pyridines; D013050:Spectrometry, Fluorescence / Q000379:methods*
D037102:Lectins; D011134:Polysaccharides; D011725:Pyridines; C505797:2,6-diaminopyridine