MASP1 and systemic lupus erythematosus: In addition, several autoimmunity-related proteins are linked to coagulation (e.g., AGT, F2) and to specific ADs, such as systemic lupus erythematosus (e.g., AGT, C1S, C7, MMP2, VWF) or autoimmune rheumatic diseases (e.g., ADIPOQ, AGT, MASP1, MMP2) (Table 1).