User:Remig/plico/remapNT

RemapNT allows you to change the chain ID, atom numbers and/or residue numbers of a polynucleotide chain by mouse actions. It also calculates group values [nucleotide names (DU, A, etc.)]. Finally it prints the resultant 1 char string to the console.

When you click on a polynucleotide chain, it gives the current chain ID, residue, residue number and atom number of the most 5'ward atom in that chain. You may then edit any value (except residue). Remap then remaps the entire chain based on those values by conventional increments and identifies each nucleotide residue.

Note that it will also remove all waters, ligands, hydrogens and %B alternates when any chain is updated.

RemapNT is a member of the Plico suite of protein folding tools described here. It may be installed and accessed as a macro with the file:

Title=PLICO Remap Polynucleotide
Script=script <path to your scripts folder>/remapNT.spt;plico_remap_nt

saved as plicoRemapNT.macro in your .jmol/macros directory as described in Macro.

Copy and paste the following to a text editor and save to your scripts directory as remapNT.spt:

#   remap - Jmol script by Ron Mignery
#   v1.9 beta    9/11/2015 -use thisModel
#
#   Calculate or change polypeptide chain, atom number, residue names and/or residue
#    numbers and print the resultant 1 char string
#
gAppendNew = false
gBusy = false

# Search for N-C-C-0
function get_bb_nward_ca_idx(idx) {
    if ({atomIndex=idx}.element == "N") {
        var c1 = (connected({atomIndex=idx}) and not {hydrogen})
        for (var i1 = 1; i1 <= c1.size; i1++) {
            if (c1[i1].element == "C") {
                var c2 = (connected({atomIndex=@{c1[i1].atomIndex}}) and not {hydrogen})
                for (var i2 = 1; i2 <= c2.size; i2++) {
                    if (c2[i2].element == "C") {
                        var c3 = (connected({atomIndex=@{c2[i2].atomIndex}})
                            and not {hydrogen})
                        for (var i3 = 1; i3 <= c3.size; i3++) {
                            if (c3[i3].element == "O") {
                                return c1[i1].atomIndex
                            }
                        }
                    }
                }
            }
        }
    }
    return -1
}

# Find N-terminal N
function find_n0_idx(aIdx) {

    select {atomIndex=aIdx}
    var sSet = {selected}
    while (sSet) {
        for (var i = 1; i <= sSet.size; i++) {
            var idx = sSet[i].atomIndex
            var caIdx = get_bb_nward_ca_idx(idx)
            if (caIdx >= 0) {
                var cset = connected({atomIndex=idx}) and not {hydrogen}
                var ccset = connected(cset) and not {hydrogen}
                if (cset.size < 2) {
                    return idx #***
                }
                else if (({ccset and {carbon}}.size = 3) and (ccset.size == 4)) { 
                    return idx #***
                }
            }
        } # endfor
        
        sSet = connected({selected}) and not {selected} and not {hydrogen}
        select {selected} or sSet
    } # endwhile
    
    return -1
}

# Bound to ALT-LEFT-CLICK by plico_remap
function remap_cargo_mb() {
    var idx =_atomPicked

    if ({atomIndex=idx}.element == "H") {
        idx = connected({atomIndex=idx})[1].atomIndex
    }

    # If n-terminal N can be found
    var n0idx = find_n0_idx(idx)
    var isValid = false
    var newResno = 1
    var newChain = "A"
    var newAtomno = 1
    if (n0idx >= 0) {

        # Prompt for new designators
        f = {atomIndex=n0idx}.file
        m = {atomIndex=n0idx}.model
        var iResno = {atomIndex=n0idx}.resno
        var iChain = {atomIndex=n0idx}.chain
        var iNo = {atomIndex=n0idx}.atomno
        select {thisModel}
        color {selected} @gScheme
        select {(chain=iChain) and thisModel}
        color {selected} @gAltScheme
        refresh
        var p = prompt("Enter n-terminal atom designator as\n"
            + "   <resno>:<chain>.N#<atomno>",
            format("%d:%s.N#%d", iResno, iChain, iNo)%0)

        # If valid
        var iColon = p.find(":")
        if (iColon > 0) {
            var iDot = p.find(".")
            if (iDot > 0) {
                var iHash = p.find("#")
                if (iHash > 0) {
                    newResno = 0 + (p[1][iColon-1])
                    newChain = p[iColon+1][iDot-1]
                    newAtomno = 0 + (p[iHash+1][0])
                    if ((newResno > 0)
                        and (newChain.size == 1)
                        and (newAtomno > 0)) {
                            isValid = true
                    }
                }
            }
        }
    }
    if (isValid) {

        delete {hydrogen and thisModel}
        delete {hoh and thisModel}
        delete %B and thisModel
        ssbonds off

        # Build inline pdb file
        var ls = "data \"append remap\"\n"
        var rs = ""
        var ls1 = format("%s:", newChain)

        select {atomIndex=n0idx}
        var cSet = {selected}
        var newAtomName = "N"
        var newGroup = "UNK"
        var s1 = "X"
        var newGreek = ""
        var newCount = ""
        var isCB = false
        var nIdx = n0idx
        var proDidx = -1
        var oxtIdx = -1
        while ((nIdx >= n0idx) or (cSet)) {
            var s = array(1, 2, 3)
            var pTrp = 0
            if (cSet.size == 0) {
                    ls += rs.replace("UNK", newGroup).replace("  SeG" , " SeG ")
                    ls1 += s1
                    rs = ""
                    newResno++
                    nIdx = -1
                    proIdx = -1
                    newGroup = "UNK"
                    s1 = "X"
                    newAtomName = "N"
                    isCB = false
            }
            else if (cSet.size == 1) {
                if (newAtomName == "N") {
                    newGreek = ""
                    newAtomName = "CA"
                }
                else if (newAtomName == "CA") {
                    newGreek = "A"
                    newAtomName = "C"
                }
                else if (newAtomName == "C") {
                    newGroup = "GLY"
                    s1 = "G"
                    newGreek = ""
                    newAtomName = "O"
                }
                else if (newAtomName == "CB") {
                    if (cSet[1].element == "C") {
                        newGroup = "ALA" # for now
                        s1 = "A"
                        newGreek = "B"
                    }
                    newAtomName = "XG"
                }
                else if (newAtomName == "XG") {
                    if (proDidx >= 0) {
                        newGroup = "PRO"
                        s1 = "P"
                        proDidx = -1
                    }
                    if (cSet[1].element == "O") { # SER CYS SEC
                        newGroup = "SER"
                        s1 = "S"
                    }
                    else if (cSet[1].element == "S") {
                        newGroup = "CYS"
                        s1 = "C"
                    }
                    else if (cSet[1].element == "Se") {
                        newGroup = "SEC"
                        s1 = "U"
                    }
                    newGreek = "G"
                    newAtomName = "XD"
                }
                else if (newAtomName == "XD") {
                    if (newGroup == "VAL") {
                        newGroup = "ILE"
                        s1 = "I"
                        newCount = "1"
                    }
                    newGreek = "D"
                    newAtomName = "XE"
                }
                else if (newAtomName == "XE") {
                    newGroup = "MET"
                    s1 = "M"
                    newGreek = "E"
                    newAtomName = "XZ"
                }
                else if (newAtomName == "XZ") {
                    if (cSet[1].element == "N") {
                        newGroup = "LYS"
                        s1 = "K"
                    }
                    else {
                        newGroup = "PHE" # for now
                        s1 = "F"
                    }
                    newGreek = "Z"
                    newAtomName = "XH"
                }
                else if (newAtomName == "XH") {
                    if (cSet[1].element == "O") {
                        newGroup = "TYR"
                        s1 = "Y"
                    }
                    else {
                        newGroup = "TRP" # for now
                        s1 = "W"
                        newCount = "2"
                    }
                    newGreek = "H"
                    newAtomName = "N"
                }
            }
            else if (cSet.size == 2) {
                var hasN = ((cSet[1].element == "N") or (cSet[2].element == "N"))
                var hasO = ((cSet[1].element == "O") or (cSet[2].element == "O"))

                # If CA 2
                if (newAtomName == "CA") {
                    var iKeep = -1
                    for (var i = 1; i <= cSet.size; i++) {
                        if (connected(cSet[i]) > 2) {
                            iKeep = i
                        }
                        else {
                            proDidx = cSet[i].atomIndex
                            cSet[i].selected = false
                        }
                    }
                    cSet = cSet[iKeep]
                    newGroup = "PRO"
                    s1 = "P"
                    newGreek = "A"
                    newAtomName = "C"
                }

                # Else if C or CB 2
                else if (newAtomName == "C") {
                    for (var i = 1; i <= cSet.size; i++) {

                        # If it connects O and (N or O)
                        var tSet = (connected(cSet[i]) and not {selected})
                        var oCount = 0
                        var nCount = 0
                        for (var j = 1; j <= tSet.size; j++) {
                            oCount += ((tSet[j].element == "O") ? 1 : 0)
                            nCount += ((tSet[j].element == "N") ? 1 : 0)
                        }
                        if ((nCount > 0) or (oCount > 1)) { # C
                            newGreek = ""
                            newAtomName = "O"
                        }
                        else { # CB
                            isCB = true
                            cSet[i].selected = false
                            cSet = (cSet and not cSet[i])
                            continue
                        }
                    } # endfor
                }

                # Else if O or N 2
                else if (newAtomName == "O") {
                    var iKeep = -1
                    for (var i = 1; i <= cSet.size; i++) {
                        if (cSet[i].element != "O") {
                            if (cSet[i].element == "N") {
                                nIdx = cSet[i].atomIndex
                            }
                            cSet[i].selected = false
                        }
                        else {
                            iKeep = i
                        }
                    }
                    cSet = cSet[iKeep]
                    newGreek = ""
                    newAtomName = (isCB ? "CB" : "N")
                }

                # Else if N or CB 2
                else if (newAtomName == "CB") {
                    for (var i = 1; i <= cSet.size; i++) {
                        if (cSet[i].element != "C") {
                            nIdx = cSet[i].atomIndex
                            cSet[i].selected = false
                            continue
                        }
                        newGreek = "B"
                        newAtomName = "XG"
                    } # endfor
                }


                # Else if XG or XGn 2
                else if (newAtomName == "XG") { # VAL THR ILE
                    newGroup = (hasO ? "THR" : "VAL")
                    s1 = (hasO ? "T" : "V")
                    newGreek = "G"
                    newAtomName = "XD"
                }


                # Else if XD or XDn 2
                else if (newAtomName == "XD") { # LEU ASP ASN
                    var cTrp = (connected(cSet[2]) and not {selected})
                    var sTrp = ((trp) ? (trp[1].element=="N") : false)
                    if ((cSet[2].element != "C") or sTrp
                        or ((connected(cSet[1]) and not {selected}).size == 0)) {
                        bRev = true
                    }
                    if ((cSet[2].element == "O") or (cSet[1].element == "N")
                        or ((cSet[1].element == "C") and (cSet[2].element != "C"))) {
                        bRev = true
                    }
                    if (hasN) {
                        if (hasO) {
                            newGroup = "ASN"
                            s1 = "N"
                        }
                        else {
                            newGroup = "HIS"
                            s1 = "H"
                        }
                    }
                    else if (hasO) {
                        newGroup = "ASP"
                        s1 = "D"
                    }
                    else {
                        newGroup = "LEU" # for now
                        s1 = "L"
                    }
                    newGreek = "D"
                    newAtomName = "XE"
                }

                # Else if XE or XEn 2
                else if (newAtomName == "XE") { # GLU GLN HIS
                    if ((cSet[2].element == "O") or (cSet[1].element == "N")
                        or ((cSet[1].element == "C") and (cSet[2].element != "C"))) {
                        bRev = true
                    }
                    if (hasO) {
                        if (hasN) {
                            newGroup = "GLN"
                            s1 = "Q"
                        }
                        else {
                            newGroup = "GLU"
                            s1 = "E"
                        }
                    }
                    newGreek = "E"
                    newAtomName = "XZ"
                }

                # Else if XZ 2
                else if (newAtomName == "XZ") { # ARG
                    if (newGroup == "TRP") {
                        pTrp = 1
                    }
                    newGreek = "Z"
                    newAtomName = "XH"
                }

                # Else if XH 2
                else if (newAtomName == "XH") { # ARG
                    newGroup = "ARG"
                    s1 = "R"
                    newGreek = "H"
                    newAtomName = "N"
                }
            }

            # Else cSet.size = 3
            else {
                # If  O
                if (newAtomName == "O") {
                    var oCount = 0
                    var iKeep = -1
                    for (var i = 1; i <= cSet.size; i++) {
                        if (cSet[i].element != "O") {
                            if (cSet[i].element == "N") {
                                nIdx = cSet[i].atomIndex
                            }
                            cSet[i].selected = false
                        }
                        else {
                            oCount++
                            if (iKeep < 0) {
                                iKeep = i
                            }
                            else {
                                oxtIdx = cSet[i].atomIndex
                            }
                        }
                    }
                    cset = cSet[iKeep[1]]
                    newGreek = ""
                    newAtomName = (isCB ? "CB" : "N")
                }
                else if (newAtomName == "CA") { # PRO
                    var iKeep = -1
                    for (var i = 1; i <= cSet.size; i++) {
                        if (connected(cSet[i]) > 2) {
                            iKeep = i
                        }
                    }
                    cSet = cSet[iKeep]

                    newGreek = "A"
                    newAtomName = "C"
                }
                else if (newAtomName == "XE") { # TRP
                    for (var i = 1; i <= cSet.size; i++) {
                        if (cSet[i].element == "N") {
                            s[1] = i
                        }
                        else if (connected(cSet[i]) > 2) {
                            s[2] = i
                        }
                        else {
                            s[3] = i
                        }
                    }
                    newGroup = "TRP"
                    s1 = "W"
                    newGreek = "E"
                    newAtomName = "XZ"
                }
                else {
                }
            }

            for (var i = 1; i <= cSet.size; i++) {
                rs += format("ATOM  %5d  %-4sUNK ", newAtomNo,
                    (cSet[s[i]].element + newGreek
                    + ((cSet.size > 1) ? (i+pTrp) : newCount)))
                rs += format("%s%4d    %8.3f", newChain, newResno, cSet[s[i]].x)
                rs += format("%8.3f%8.3f\n", cSet[s[i]].y, cSet[s[i]].z)
                if (newGreek == "XT") {
                    newGreek == ""
                }
                newAtomno++
            }
            newCount = ""
            cSet = (connected({selected}) and not {selected}
                and not {atomIndex=@nIdx} and not {atomIndex=proDidx})
            select ({selected} or cSet and not {atomIndex=nIdx}
                 and not {atomIndex=proDidx})

        } # endwhile

        # Replace chain with new chain
        if (oxtIdx >= 0) {
            rs += format("ATOM  %5d  OXT UNK %s", newAtomNo, newChain)
            rs += format("%4d    %8.3f", newResno, {atomIndex=oxtIdx}.x)
            rs += format("%8.3f%8.3f\n", {atomIndex=oxtIdx}.y, {atomIndex=oxtIdx}.z)
        }
        ls += rs.replace("UNK", newGroup).replace("  SeG" , " SeG ")
        ls1 += s1
        delete {selected}
        ls += "end \"append remap\""
        gAppendNew = appendNew
        set appendNew false
        script inline @{ls}
        set appendNew gAppendNew
        var xx = {element="Xx"}
        for (var i = 1; i <= xx.size; i++) {
             connect 1.8 {atomindex=@{xx[i].atomIndex}}
        }
        ssbonds on
        gEcho += format("|Chain %s has been rebuilt", newChain)
        set echo TOP LEFT
        echo @gEcho
        print ls1

    }
    else {
        color {selected} @gScheme
    }
}

# Top level of Remap
function plico_remap() {

    # Load common functions if not already
    if (kCommon < 6) {
        script $SCRIPT_PATH$plicoCommon.spt
        if (kCommon < 6) {
            prompt ("A newer version of plicoCommon.SPT is required")
            quit
        }
    }

    gPlico = "Remap"
    plico_prelim(false, true)
    
    gEcho = "_______REMAP_______|ALT-CLICK=select chain|SHIFT-DOUBLE-CLICK=exit"
    echo @gEcho

    set picking ON
    bind "ALT-LEFT-CLICK" "_pickAtom";
    bind "ALT-LEFT-CLICK" "+:remap_cargo_mb";
    bind "SHIFT-DOUBLE" "plico_exit(true)";
    bind "LEFT-CLICK" "+:plico_menu_toggle";
}

# End of REMAP.SPT

Contributors

Remig