Involved in the control of the PYK10 complex size and possibly substrate specificity. May be exported from the endoplasmic reticulum upon interaction with MVP1. Part of the PYK10 complex. Interacts with MVP1. Only transiently resident in a specific ER subcompartment and is either post-translationally modified prior to export or targeted for degradation. Expressed mainly in roots. Expressed in 10-day-old seedlings. Belongs to the 'GDSL' lipolytic enzyme family. Lacks the conserved active site 'GDSL' motif. Its enzyme activity is therefore unsure. Truncated N-terminus.