SUMMARYLittle is known about the role of proteins that lack primary sequence homology with any known motifs (proteins with unknown functions, PUFs); these comprise more than 10% of all proteins. This paper offers a generalized experimental strategy for identifying the functions of such proteins, particularly in relation to metabolism. Using this strategy, we have identified a novel regulatory function for Arabidopsis locus At3g30720 (which we term QQS for qua-quine starch). QQS expression, revealed through global mRNA profiling, is up-regulated in an Arabidopsis Atss3 mutant that lacks starch synthase III and has increased leaf starch content. Analysis of public microarray data using MetaOmGraph (metnetdb.org), in combination with transgenic Arabidopsis lines containing QQS promoter-GUS transgenes, indicated that QQS expression responds to a variety of developmental/genetic/environmental perturbations. In addition to the increase in the Atss3 mutant, QQS is up-regulated in the carbohydrate mutants mex1 and sis8. A 586 nt sequence for the QQS mRNA was identified by 5¢ and 3¢ RACE experiments. The QQS transcript is predicted to encode a protein of 59 amino acids, whose expression was confirmed by immunological Western blot analysis. The QQS gene is recognizable in sequenced Arabidopsis ecotypes, but is not identifiable in any other sequenced species, including the closely related Brassica napus. Transgenic RNA interference lines in which QQS expression is reduced show excess leaf starch content at the end of the illumination phase of a diurnal cycle. Taken together, the data identify QQS as a potential novel regulator of starch biosynthesis.

Peripubertal obesity is associated with hyperandrogenemia and hyperinsulinemia throughout puberty, being especially marked shortly before and during early puberty. P and T concentrations in normal-weight Tanner 1-3 girls increase overnight, with similar but less evident changes in obese girls.

OBJECTIVE—This study examined 1) whether the benefits of mothers’ and fathers’ accepting relationships with their adolescents regarding diabetes control were due to parental monitoring and 2) how parents together may provide sufficient acceptance and monitoring for diabetes management. RESEARCH DESIGN AND METHODS—Adolescents aged 10–14 years with type 1 diabetes (n = 185) and their mothers (n = 185) and fathers (n = 145) completed assessments of parental acceptance and monitoring of diabetes tasks. Adolescents completed a modified version of the Self-Care Inventory (1) to measure adherence. A1C scores were used as a marker of glycemic control. RESULTS—Mediational analyses revealed that the benefits of adolescents’ reports of fathers’ acceptance on A1C and mothers’ and fathers’ acceptance on better adherence were partially mediated by monitoring. Both mothers’ and fathers’ monitoring and fathers’ acceptance had independent effects in predicting adherence. However, only fathers’ monitoring had an independent effect on A1C. The effect of fathers’ monitoring on A1C occurred as fathers were monitoring at a lower level than mothers. Mothers’ and fathers’ reports of their own acceptance and monitoring were not associated with A1C or adherence. CONCLUSIONS—Results reveal the importance of fathers’ acceptance and monitoring in diabetes management, a role that should be encouraged, despite the little attention it has received.

Peripubertal obesity is associated with marked hyperandrogenemia, which is especially pronounced in early puberty.