Before revision:  We discuss application of this model to the problem of prediction of the native conformation of a protein from its primary structure and to the description of the dynamics of a protein.
After revision:  We also consider contribution of contacts of fragments to the energy of protein conformation, and contribution from statistical potentials of some hierarchical set of larger protein fragments. This set of fragments is constructed using the distribution of frequencies of occurrence of short fragments. We discuss analogy between this approach and deep learning methods. We discuss applications of this model to the problem of prediction of the native conformation of a protein from its primary structure and to the description of the dynamics of a protein.