Q-L53 is defined by the presence of the L53 Single Nucleotide Polymorphism (SNP).
Q-L53 has descendants across much of Eurasia and in the pre-Columbian Americas.
It is the parent of the major Haplogroup Q-L54 branch.
This is Thomas Krahn at the Genomic Research Center's Draft tree Proposed Tree for haplogroup Q-L53.
It shows the first two branch points.