L-serine biosynthetic process

Across TCGA patient cohorts, RNA activity of the L-serine biosynthetic process pathway is significantly associated with the protein abundance of multiple proteins, with the BRCA cohort showing a particularly strong set of associations.

The most reproducible pathway-associated proteins across cancer lineages are PSAT1, PSPH, and PHGDH, each associated with the pathway in up to 10 cancer types. Since the analysis shows associations rather than directional relationships, both pathway-to-partner and partner-to-pathway views are reported.

Each partner is linked to its corresponding Q-omics profile. The scatter plot shows the strongest association, L-serine biosynthetic process activity versus PSAT1 in BRCA (Pearson r = 0.75).

Pathway-associated proteins by consensus

Ranked by combined sampling and lineage consensus. X-score (pathway→partner) and Y-score (partner→pathway) are standardized regression coefficients; both directions are reported because the association is undirected. The reported p-values are derived from the association test.

Lineage	Partner protein	X-score	Y-score	p(X)	p(Y)	Sampling consensus	Lineage consensus
BRCA	PSAT1 →	+1.512	+0.113	<.001	<.001	3	10
LSCC	PSPH →	+0.618	+0.093	<.001	<.001	3	10
BRCA	PHGDH →	+0.874	+0.102	<.001	<.001	3	9
OV	AARS1 →	+0.330	+0.066	<.001	<.001	3	9
BRCA	ASNS →	+0.858	+0.102	<.001	<.001	3	9
LSCC	RBBP5_S497 →	+0.736	+0.106	<.001	<.001	3	9

Each partner links to its Q-omics profile. Showing the 6 strongest associations by consensus.

GO:0006564 vs PSAT1 — BRCA

Explore this scatter interactively →