Alignment of inhibitory and noninhibitory chemokines identifies an N/QF motif specific to the inhibitory chemokines
Chemokine
.
310 helical turn sequence
.
Human MIP-1α
IPQNFI
Murine MIP-1α
IPRQFI
Human MIP-1β
LPRNFV
Murine MIP-1β
LHRSFT
Human RANTES
LPRAHI
Murine RANTES
LPRAHV
Human MCP1
ISVQRL
Chemokine
.
310 helical turn sequence
.
Human MIP-1α
IPQNFI
Murine MIP-1α
IPRQFI
Human MIP-1β
LPRNFV
Murine MIP-1β
LHRSFT
Human RANTES
LPRAHI
Murine RANTES
LPRAHV
Human MCP1
ISVQRL
Note that human and murine MIP-1α and human MIP-1β are active as HSPC inhibitors, whereas murine MIP-1β, human and murine RANTES, and human MCP1 are inactive.