Abstract
Using the Forster equations we have estimated the rate of energy transfer from tryptophans to hemes in hemoglobin. We computed the orientation factors and the consequent transfer rates from the crystallographic coordinates of human oxy- and deoxyhemoglobin. The intrasubunit distances between hemes and tryptophans allow lifetimes between 5 and 15 ps per each ns of tryptophan lifetime. Lifetimes of several hundred ps would be allowed by the intersubunit distances. However, these distances become operative only when one heme per tetramer does not accept transfer. If more than one heme per tetramer does not function as an acceptor, lifetimes of several ns would be allowed.
| Original language | English |
|---|---|
| Title of host publication | Proceedings of SPIE - The International Society for Optical Engineering |
| Publisher | Publ by Int Soc for Optical Engineering |
| Pages | 550-555 |
| Number of pages | 6 |
| Volume | 1640 |
| ISBN (Print) | 0819407860 |
| State | Published - 1 Jan 1992 |
| Event | Time-Resolved Laser Spectroscopy in Biochemistry III - Los Angeles, CA, USA Duration: 20 Jan 1992 → 22 Jan 1992 |
Other
| Other | Time-Resolved Laser Spectroscopy in Biochemistry III |
|---|---|
| City | Los Angeles, CA, USA |
| Period | 20/01/92 → 22/01/92 |
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Emission lifetimes of human hemoglobin computed from the atomic coordinates. / Gryczynski, Zygmunt; Tenenholz, Todd; Bucci, Enrico.
Proceedings of SPIE - The International Society for Optical Engineering. Vol. 1640 Publ by Int Soc for Optical Engineering, 1992. p. 550-555.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Research › peer-review
TY - GEN
T1 - Emission lifetimes of human hemoglobin computed from the atomic coordinates
AU - Gryczynski, Zygmunt
AU - Tenenholz, Todd
AU - Bucci, Enrico
PY - 1992/1/1
Y1 - 1992/1/1
N2 - Using the Forster equations we have estimated the rate of energy transfer from tryptophans to hemes in hemoglobin. We computed the orientation factors and the consequent transfer rates from the crystallographic coordinates of human oxy- and deoxyhemoglobin. The intrasubunit distances between hemes and tryptophans allow lifetimes between 5 and 15 ps per each ns of tryptophan lifetime. Lifetimes of several hundred ps would be allowed by the intersubunit distances. However, these distances become operative only when one heme per tetramer does not accept transfer. If more than one heme per tetramer does not function as an acceptor, lifetimes of several ns would be allowed.
AB - Using the Forster equations we have estimated the rate of energy transfer from tryptophans to hemes in hemoglobin. We computed the orientation factors and the consequent transfer rates from the crystallographic coordinates of human oxy- and deoxyhemoglobin. The intrasubunit distances between hemes and tryptophans allow lifetimes between 5 and 15 ps per each ns of tryptophan lifetime. Lifetimes of several hundred ps would be allowed by the intersubunit distances. However, these distances become operative only when one heme per tetramer does not accept transfer. If more than one heme per tetramer does not function as an acceptor, lifetimes of several ns would be allowed.
UR - http://www.scopus.com/inward/record.url?scp=0026441940&partnerID=8YFLogxK
M3 - Conference contribution
SN - 0819407860
VL - 1640
SP - 550
EP - 555
BT - Proceedings of SPIE - The International Society for Optical Engineering
PB - Publ by Int Soc for Optical Engineering
ER -