  In this article we study the Poisson algebra structure on the homology of the
totalization of a fibrant cosimplicial space associated with an operad with
multiplication. This structure is given as the Browder operation induced by the
action of little disks operad, which was found by McClure and Smith. We show
that the Browder operation coincides with the Gerstenhaber bracket on the
Hochschild homology, which appears as the E2-term of the homology spectral
sequence constructed by Bousfield. In particular we consider a variant of the
space of long knots in higher dimensional Euclidean space, and show that
Sinha's homology spectral sequence computes the Poisson algebra structure of
the homology of the space. The Browder operation produces a homology class
which does not directly correspond to chord diagrams.
