The method of joint probability distribution functions applied to SIR-MIR and to SIRAS-MIRAS cases

被引：12

作者：

Giacovazzo, C

Siliqi, D

机构：

[1] Univ Bari, Dipartimento Geomineral, I-70125 Bari, Italy

[2] Fac Nat Sci, Dept Inorgan Chem, Lab Xray Diffract, Tirana, Albania

来源：

ACTA CRYSTALLOGRAPHICA SECTION A | 2002年 / 58卷

关键词：

D O I：

10.1107/S010876730201632X

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

SIR-MIR and SIRAS-MIRAS cases are studied by application of the joint probability distribution method. The final results are conditional probability distributions of the protein phases given the structure-factor moduli of the protein and of the derivatives, and the structure factors of the heavy-atom substructures. The approach is able to treat errors arising from measurements, from the heavy-atom structure model and from the lack of isomorphism. The relations between the present approach and previous methods are described. The formulas have been implemented in a procedure that is able to automatically phase protein reflections up to protein resolution [Giacovazzo, Ladisa & Siliqi (2002). Acta Cryst. A58, 598-604].

引用

收藏

页码：590 / 597

页数：8

相关论文

共 12 条

[1]

Abramowitz M., 1970, HDB MATH FUNCTIONS

[2] THE TREATMENT OF ERRORS IN THE ISOMORPHOUS REPLACEMENT METHOD [J].

BLOW, DM ;

CRICK, FHC .

ACTA CRYSTALLOGRAPHICA, 1959, 12 (10) :794-802

[3] MAD phasing:: probabilistic estimate of |Foa| [J].

Burla, MC ;

Carrozzini, B ;

Cascarano, GL ;

Giacovazzo, C ;

Polidori, G ;

Siliqi, D .

ACTA CRYSTALLOGRAPHICA SECTION D-STRUCTURAL BIOLOGY, 2002, 58 :928-935

[4] Crystal structure solution of proteins by direct methods: an automatic procedure for SIR-MIR and SIRAS-MIRAS cases [J].

Giacovazzo, C ;

Ladisa, M ;

Siliqi, D .

ACTA CRYSTALLOGRAPHICA SECTION A, 2002, 58 :598-604

[5] The method of joint probability distribution functions applied to MAD techniques. The two-wavelength case for acentric crystals [J].

Giacovazzo, C ;

Siliqi, D .

ACTA CRYSTALLOGRAPHICA A-FOUNDATION AND ADVANCES, 2001, 57 :700-707

[6] The method of joint probability distribution functions applied to MAD techniques. The centric case [J].

Giacovazzo, C ;

Siliqi, D .

ACTA CRYSTALLOGRAPHICA SECTION A, 2001, 57 :414-419

[7] The method of joint probability distribution functions applied to the one-wavelength anomalous-scattering (OAS) case [J].

Giacovazzo, C ;

Siliqi, D .

ACTA CRYSTALLOGRAPHICA SECTION A, 2001, 57 :40-46

[8] Improving direct-methods phases by heavy-atom information and solvent flattening [J].

Giacovazzo, C ;

Siliqi, D .

ACTA CRYSTALLOGRAPHICA SECTION A, 1997, 53 :789-798

[9] ON INTEGRATING THE TECHNIQUES OF DIRECT METHODS AND ISOMORPHOUS REPLACEMENT .1. THE THEORETICAL BASIS [J].

HAUPTMAN, H .

ACTA CRYSTALLOGRAPHICA SECTION A, 1982, 38 (MAY) :289-294

[10] UNBIASED 3-DIMENSIONAL REFINEMENT OF HEAVY-ATOM PARAMETERS BY CORRELATION OF ORIGIN-REMOVED PATTERSON FUNCTIONS [J].

TERWILLIGER, TC ;

EISENBERG, D .

ACTA CRYSTALLOGRAPHICA SECTION A, 1983, 39 (SEP) :813-817