DOI: 10.1073/pnas.86.17.6617. Separate photosensitizers mediate degradation of the 32-kDa photosystem II reaction center protein in the visible and UV spectral regions.

Separate photosensitizers mediate degradation of the 32-kDa photosystem II reaction center protein in the visible and UV spectral regions.

10.1073/pnas.86.17.6617

Crossref journal-article

Proceedings of the National Academy of Sciences

Proceedings of the National Academy of Sciences (341)

Abstract

A component of the photosystem II reaction center, the 32-kDa protein, is rapidly turned over in the light. The mechanism of its light-dependent metabolism is largely unknown. We quantified the rate of 32-kDa protein degradation over a broad spectral range (UV, visible, and far red). The quantum yield for degradation was highest in the UVB (280-320 nm) region. Spectral evidence demonstrates two distinctly different photosensitizers for 32-kDa protein degradation. The data implicate the bulk photosynthetic pigments (primarily chlorophyll) in the visible and far red regions, and plastoquinone (in one or more of its redox states) in the UV region. A significant portion of 32-kDa protein degradation in sunlight is attributed to UVB irradiance.

Bibliography

Greenberg, B. M., Gaba, V., Canaani, O., Malkin, S., Mattoo, A. K., & Edelman, M. (1989). Separate photosensitizers mediate degradation of the 32-kDa photosystem II reaction center protein in the visible and UV spectral regions. Proceedings of the National Academy of Sciences, 86(17), 6617â6620.

Authors 6

B M Greenberg (first)
V Gaba (additional)
O Canaani (additional)
S Malkin (additional)
A K Mattoo (additional)
M Edelman (additional)

References 0 Referenced 246

None

Dates

Type	When
Created	19 years, 3 months ago (May 31, 2006, 7:02 a.m.)
Deposited	3 years, 4 months ago (April 13, 2022, 12:46 p.m.)
Indexed	4 weeks, 1 day ago (Aug. 6, 2025, 8:29 a.m.)
Issued	36 years ago (Sept. 1, 1989)
Published	36 years ago (Sept. 1, 1989)
Published Online	36 years ago (Sept. 1, 1989)
Published Print	36 years ago (Sept. 1, 1989)

Funders 0

None

BibTeX

@article{Greenberg_1989, title={Separate photosensitizers mediate degradation of the 32-kDa photosystem II reaction center protein in the visible and UV spectral regions.}, volume={86}, ISSN={1091-6490}, url={http://dx.doi.org/10.1073/pnas.86.17.6617}, DOI={10.1073/pnas.86.17.6617}, number={17}, journal={Proceedings of the National Academy of Sciences}, publisher={Proceedings of the National Academy of Sciences}, author={Greenberg, B M and Gaba, V and Canaani, O and Malkin, S and Mattoo, A K and Edelman, M}, year={1989}, month=sep, pages={6617–6620} }

JSON

{
  "indexed": {
    "date-parts": [
      [
        2025,
        8,
        6
      ]
    ],
    "date-time": "2025-08-06T12:29:48Z",
    "timestamp": 1754483388769
  },
  "reference-count": 0,
  "publisher": "Proceedings of the National Academy of Sciences",
  "issue": "17",
  "content-domain": {
    "domain": [
      "www.pnas.org"
    ],
    "crossmark-restriction": true
  },
  "published-print": {
    "date-parts": [
      [
        1989,
        9
      ]
    ]
  },
  "abstract": "<jats:p>A component of the photosystem II reaction center, the 32-kDa protein, is rapidly turned over in the light. The mechanism of its light-dependent metabolism is largely unknown. We quantified the rate of 32-kDa protein degradation over a broad spectral range (UV, visible, and far red). The quantum yield for degradation was highest in the UVB (280-320 nm) region. Spectral evidence demonstrates two distinctly different photosensitizers for 32-kDa protein degradation. The data implicate the bulk photosynthetic pigments (primarily chlorophyll) in the visible and far red regions, and plastoquinone (in one or more of its redox states) in the UV region. A significant portion of 32-kDa protein degradation in sunlight is attributed to UVB irradiance.</jats:p>",
  "DOI": "10.1073/pnas.86.17.6617",
  "type": "journal-article",
  "created": {
    "date-parts": [
      [
        2006,
        5,
        31
      ]
    ],
    "date-time": "2006-05-31T11:02:09Z",
    "timestamp": 1149073329000
  },
  "page": "6617-6620",
  "update-policy": "http://dx.doi.org/10.1073/pnas.cm10313",
  "source": "Crossref",
  "is-referenced-by-count": 246,
  "title": "Separate photosensitizers mediate degradation of the 32-kDa photosystem II reaction center protein in the visible and UV spectral regions.",
  "prefix": "10.1073",
  "volume": "86",
  "author": [
    {
      "given": "B M",
      "family": "Greenberg",
      "sequence": "first",
      "affiliation": [
        {
          "name": "Department of Plant Genetics, Weizmann Institute of Science, Rehovot, Israel."
        }
      ]
    },
    {
      "given": "V",
      "family": "Gaba",
      "sequence": "additional",
      "affiliation": [
        {
          "name": "Department of Plant Genetics, Weizmann Institute of Science, Rehovot, Israel."
        }
      ]
    },
    {
      "given": "O",
      "family": "Canaani",
      "sequence": "additional",
      "affiliation": [
        {
          "name": "Department of Plant Genetics, Weizmann Institute of Science, Rehovot, Israel."
        }
      ]
    },
    {
      "given": "S",
      "family": "Malkin",
      "sequence": "additional",
      "affiliation": [
        {
          "name": "Department of Plant Genetics, Weizmann Institute of Science, Rehovot, Israel."
        }
      ]
    },
    {
      "given": "A K",
      "family": "Mattoo",
      "sequence": "additional",
      "affiliation": [
        {
          "name": "Department of Plant Genetics, Weizmann Institute of Science, Rehovot, Israel."
        }
      ]
    },
    {
      "given": "M",
      "family": "Edelman",
      "sequence": "additional",
      "affiliation": [
        {
          "name": "Department of Plant Genetics, Weizmann Institute of Science, Rehovot, Israel."
        }
      ]
    }
  ],
  "member": "341",
  "published-online": {
    "date-parts": [
      [
        1989,
        9
      ]
    ]
  },
  "container-title": "Proceedings of the National Academy of Sciences",
  "original-title": [],
  "language": "en",
  "link": [
    {
      "URL": "https://pnas.org/doi/pdf/10.1073/pnas.86.17.6617",
      "content-type": "unspecified",
      "content-version": "vor",
      "intended-application": "similarity-checking"
    }
  ],
  "deposited": {
    "date-parts": [
      [
        2022,
        4,
        13
      ]
    ],
    "date-time": "2022-04-13T16:46:02Z",
    "timestamp": 1649868362000
  },
  "score": 1,
  "resource": {
    "primary": {
      "URL": "https://pnas.org/doi/full/10.1073/pnas.86.17.6617"
    }
  },
  "subtitle": [],
  "short-title": [],
  "issued": {
    "date-parts": [
      [
        1989,
        9
      ]
    ]
  },
  "references-count": 0,
  "journal-issue": {
    "issue": "17",
    "published-print": {
      "date-parts": [
        [
          1989,
          9
        ]
      ]
    }
  },
  "alternative-id": [
    "10.1073/pnas.86.17.6617"
  ],
  "URL": "http://dx.doi.org/10.1073/pnas.86.17.6617",
  "relation": {},
  "ISSN": [
    "0027-8424",
    "1091-6490"
  ],
  "subject": [],
  "container-title-short": "Proc. Natl. Acad. Sci. U.S.A.",
  "published": {
    "date-parts": [
      [
        1989,
        9
      ]
    ]
  },
  "assertion": [
    {
      "value": "1989-09-01",
      "order": 2,
      "name": "published",
      "label": "Published",
      "group": {
        "name": "publication_history",
        "label": "Publication History"
      }
    }
  ]
}