ID 3.1.3.57 DE inositol-1,4-bisphosphate 1-phosphatase. AN inositol polyphosphate 1-phosphatase. CA 1D-myo-inositol 1,4-bisphosphate + H2O = 1D-myo-inositol 4-phosphate + CA phosphate. CC -!- Acts on inositol 1,4-bisphosphate and inositol 1,3,4-trisphosphate CC (forming inositol 3,4-bisphosphate) with similar Vmax for both CC substrates, but with a 5 times higher affinity for the bisphosphate. CC -!- Does not act on inositol 1-phosphate, inositol 1,4,5-trisphosphate or CC inositol 1,3,4,5-tetrakisphosphate. DR Q3ZCK3, BPNT1_BOVIN; Q869K3, BPNT1_DICDI; O95861, BPNT1_HUMAN; DR Q9Z0S1, BPNT1_MOUSE; Q9Z1N4, BPNT1_RAT ; Q42546, DPNP1_ARATH; DR O49623, DPNP2_ARATH; Q8GY63, DPNP3_ARATH; Q84VY5, DPNP4_ARATH; DR Q55F34, DPNP_DICDI ; C4M4T9, DPNP_ENTH1 ; O94505, DPNP_SCHPO ; DR P21327, INPP_BOVIN ; C4M633, INPP_ENTH1 ; P49441, INPP_HUMAN ; DR P49442, INPP_MOUSE ; //