Transcription factor (PubMed:10698492, PubMed:11909962). Directly controls the expression of cytokine and chemokine genes in a wide variety of different cellular contexts (PubMed:20378371). May control the differentiation, survival and proliferation of lymphoid cells (PubMed:20378371). May also regulate angiogenesis through regulation of expression of genes controlling endothelial cell migration and invasion (PubMed:15247905, PubMed:15592518). {ECO:0000269|PubMed:10698492, ECO:0000269|PubMed:11909962, ECO:0000269|PubMed:15247905, ECO:0000269|PubMed:15592518, ECO:0000303|PubMed:20378371}. [Isoform Ets-1 p27]: Acts as a dominant-negative for isoform c-ETS-1A. . This is the function of ENSG00000134954 (ETS1, ETS proto-oncogene 1, transcription factor).