Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1659
Number of amino acids:30
Molecular Weight:3085.65 Da
Theoretical pI:5.96


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)00%
Cysteine CYS (C)620%
Glutamic Acid GLU (E)13.33%
Aspartic Acid ASP (D)00%
Glycine GLY (G)310%
Phynylalanine PHE (F)00%
Isoleucine ILE (I)413.33%
Histidine HIS (H)00%
Lysine LYS (K)13.33%
Methionine MET (M)00%
Leucine LEU (L)00%
Asparagine ASN (N)13.33%
Glutamine GLN (Q)00%
Proline PRO (P)26.67%
Serine SER (S)516.67%
Arginine ARG (R)00%
Threonine THR (T)13.33%
Tryptophan TRP (W)00%
Valine VAL (V)413.33%
Tyrosine TYR (Y)26.67%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC130
HydrogenH210
NitrogenN32
OxygenO42
SulphurS6

FormulaC130H210N32O42S6
Total Number of Atoms:420


Total number of positively charged residues (ARG + LYS):1
Total number of negatively charged residues (ASP + GLU):1
Extinction Coefficient:This protein does not contain any Tryptophan residues. Experience shows that this could result in more than 10% error in the computed extinction coefficient.

Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    3355
Absorption 0.1% (=1 g/l)    1.087,   assuming all pairs of CYS residues form cystines

Ext. coefficient    2980
Absorption 0.1% (=1 g/l)    0.966,   assuming all CYS residues are reduced
Aromaticity:0.067

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 34.30

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[33.33, 36.67, 3.33]

Amino acids in helix: V, I, Y, F, W, L || Amino acids in turn: N, P, G, S || Amino acids in sheet: E, M, A, L
Aliphatic index:90.6664
Grand average of hydropathicity (GRAVY):0.91