Methionine monooxygenase that promotes depolymerization of F-actin by mediating oxidation of residues 'Met-44' and 'Met-47' on actin to form methionine-sulfoxide, resulting in actin filament disassembly and preventing repolymerization (PubMed:24440334, PubMed:29343822). Regulates the disassembly of branched actin networks also by oxidizing ARP3B-containing ARP2/3 complexes leading to ARP3B dissociation from the network (PubMed:34106209). Acts as a key regulator of the SRF signaling pathway elicited by nerve growth factor and serum: mediates oxidation and subsequent depolymerization of nuclear actin, leading to increase MKL1/MRTF-A presence in the nucleus and promote SRF:MKL1/MRTF-A-dependent gene transcription. Does not activate SRF:MKL1/MRTF-A through RhoA (PubMed:24440334). H(+) + L-methionyl-[F-actin] + NADPH + O2 = H2O + L-methionyl-(R)-S-oxide-[F-actin] + NADP(+) Specifically inhibited by CCG-1423, a small molecule inhibitor of SRF:MKL1/MRTF-A-dependent transcription. Interacts with PLXNA4 (By similarity). Interacts with RAB1B (PubMed:15694364, PubMed:27552051). Interacts with MAPK1/ERK2 (By similarity). Interacts with RAB35, RAB8A, RAB10, RAB13 and RAB15 (in their GTP-bound forms); binding to RAB35 is of low affinity compared to other Rab proteins; at least in case of RAB8A may bind 2 molecules of RAB8A simultaneously through a high and a low affinity binding site, respectively (PubMed:27552051). May interact with MAPK1/ERK2 (By similarity). Interacts with CORO1C; this interaction recruits MICAL2 to the actin filaments (PubMed:34106209). The C-terminal RAB-binding domain (RBD) (1796-1945), also described as bivalent Mical/EHBP Rab binding (bMERB) domain, mediates binding to predominantly RAB8A, RAB10, RAB13 and RAB15 (in their GTP-bound forms). Belongs to the Mical family. Extended N-terminus. Truncated N-terminus.