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Reference.org
Type III secretion system
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<p>The type III secretion system (T3SS or TTSS) is one of the <a href="/facts/Bacterial_secretion_system/fYgCqhak">bacterial secretion systems</a> used by <a href="/facts/Bacteria/wC8xSCsU">bacteria</a> to <a href="/facts/Secretion/VHk9eLAV">secrete</a> their <a href="/facts/Bacterial_effector_protein/2xo5F3fF">effector proteins</a> into the host's cells to promote <a href="/facts/Virulence/TYmX1Fa6">virulence</a> and <a href="/facts/Colonisation_(biology)/ySl8Qvan">colonisation</a>. While the type III secretion system has been widely regarded as equivalent to the injectisome, many argue that the injectisome is only part of the type III secretion system, which also include structures like the flagellar export apparatus. The T3SS is a needle-like protein complex found in several species of <a href="/facts/Pathogenic_bacteria/X5QcVN5j">pathogenic</a> <a href="/facts/Gram-negative_bacteria/S1PbVtp4">gram-negative bacteria</a>. </p>