This study addresses subject-specific requirements for research infrastructure with a focus on the influences of Open Access (OA). OA is treated in a broad sense covering open access to literature, open data and open science. Considering the wide variety of aspects to be analysed and the early stages of developing a general account of OA infrastructure, the study took a case-based approach and deliberately did not attempt to provide a representative account of research. In the pragmatic approach taken, six partners (institutions and organisations) were chosen to provide their subjective view on OA infrastructure. These partners are considered as exemplars of research and infrastructure institutions in a given subject area.