subgraph from graph matlab function

if i have a graph such as

WW = [20 10 12 14 12 10 20]; 
from=[1 2 2 3 4 3 5];
to = [4 1 4 2 3 5 4];
DG = sparse(from,to,WW); UG = tril(DG + DG');
d=graphallshortestpaths(UG,'directed',false);

is there any method to take subgraph for example(graph that contain only nodes 1 3 5)

thanks in advance

hassan