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F-actin-binding protein which plays a role in cross-linking actin to other cytoskeletal proteins and also binds to microtubules. Plays an important role in ERBB2-dependent stabilization of microtubules at the cell cortex. Acts as a positive regulator of Wnt receptor signaling pathway and is involved in the translocation of AXIN1 and its associated complex (composed of APC, CTNNB1 and GSK3B) from the cytoplasm to the cell membrane. Has actin-regulated ATPase activity and is essential for controlling focal adhesions (FAs) assembly and dynamics. Interaction with CAMSAP3 at the minus ends of non-centrosomal microtubules tethers microtubules minus-ends to actin filaments, regulating focal adhesion size and cell migration. May play role in delivery of transport vesicles containing GPI-linked proteins from the trans-Golgi network through its interaction with GOLGA4. Plays a key role in wound healing and epidermal cell migration. Required for efficient upward migration of bulge cells in response to wounding and this function is primarily rooted in its ability to coordinate microtubule dynamics and polarize hair follicle stem cells. As a regulator of actin and microtubule arrangement and stabilization, it plays an essential role in neurite outgrowth, branching and spine formation during brain development.
Gene References into Functions
Loss of ACF7 leads to aberrant microtubule organization, tight junction stabilization and impaired wound closure in vitro. ACF7 level is also correlated with development and progression of ulcerative colitis (UC) in patients. PMID: 28541346
Study summarized the physiological role of MACF1 as well as its pathological one in various cancers. MACF1 comprises different isoforms, and is broadly expressed in brain, spinal cord, lung, kidney, heart, bone and skeletal muscles tissues. It plays a crucial role in cell proliferation, migration and cell signaling, and is also closely associated with many cancer. PMID: 28782898
in mammalian intestinal epithelial cells, the spectraplakin ACF7 (also known as MACF1) specifically binds to CAMSAP3 and is required for the apical localization of CAMSAP3-decorated microtubule minus ends. PMID: 27802168
MACF1b may contribute to the genetic etiology and mechanistic causation of Parkinson's disease. PMID: 27021023
ACF7, a member of the spectraplakin family of cytoskeletal crosslinking proteins, interacts with Nezha (also called CAMSAP3) at the minus ends of noncentrosomal microtubules and anchors them to actin filaments. PMID: 27693509
the present study represents the first investigation on the functional role of MACF1 in tumor cell biology, as well as demonstrates its potential as a unique biomarker that can be targeted synergistically with TMZ as part of a combinatorial therapeutic approach for the treatment of genetically multifarious glioblastomas PMID: 27959385
Duplication in the microtubule-actin cross-linking factor 1 gene causes neuromuscular diseases. PMID: 24899269
uncovered a role for ELMO in the recruitment of ACF7 to the membrane to promote microtubule capture and stability PMID: 23184944
ACF7 targeting to the plasma membrane is both required and sufficient for microtubule capture downstream of ErbB2. PMID: 20937854
p230, through its interaction with MACF1, provides the molecular link for transport of GPI-anchored proteins along the microtubule and actin cytoskeleton from the TGN to the cell periphery. PMID: 15265687
In two lung cell lines, MACF1b was chiefly localized to the Golgi complex. The domain of MACF1b that targets it to the Golgi was found at the N-terminal part of the region that contains the plakin repeats. PMID: 16076900
Isoform 2: Ubiquitously expressed. Isoform 1: Expressed in cell lines NCI-H460, A-549 and HaCaT. Isoform 4: Expressed in heart, lung, pituitary and placenta, not found in brain, kidney, liver, pancreas or skeletal muscle.