Physicochemical Properties of Peptide



PPepDB ID:PPepDB_912
Number of amino acids:234
Molecular Weight:24808.91 Da
Theoretical pI:5.38


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)166.84%
Cysteine CYS (C)187.69%
Glutamic Acid GLU (E)72.99%
Aspartic Acid ASP (D)114.7%
Glycine GLY (G)2811.97%
Phynylalanine PHE (F)177.26%
Isoleucine ILE (I)62.56%
Histidine HIS (H)10.43%
Lysine LYS (K)114.7%
Methionine MET (M)31.28%
Leucine LEU (L)125.13%
Asparagine ASN (N)114.7%
Glutamine GLN (Q)114.7%
Proline PRO (P)125.13%
Serine SER (S)218.97%
Arginine ARG (R)52.14%
Threonine THR (T)208.55%
Tryptophan TRP (W)31.28%
Valine VAL (V)145.98%
Tyrosine TYR (Y)72.99%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1083
HydrogenH1639
NitrogenN287
OxygenO341
SulphurS21

FormulaC1083H1639N287O341S21
Total Number of Atoms:3371


Total number of positively charged residues (ARG + LYS):16
Total number of negatively charged residues (ASP + GLU):18
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    28055
Absorption 0.1% (=1 g/l)    1.131,   assuming all pairs of CYS residues form cystines

Ext. coefficient    26930
Absorption 0.1% (=1 g/l)    1.085,   assuming all CYS residues are reduced
Aromaticity:0.115

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 33.37

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[25.21, 30.77, 16.24]

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:54.1881
Grand average of hydropathicity (GRAVY):-0.10