Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4432
Number of amino acids:924
Molecular Weight:103732 Da
Theoretical pI:5.13


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)444.76%
Cysteine CYS (C)192.06%
Glutamic Acid GLU (E)616.6%
Aspartic Acid ASP (D)566.06%
Glycine GLY (G)555.95%
Phynylalanine PHE (F)394.22%
Isoleucine ILE (I)636.82%
Histidine HIS (H)151.62%
Lysine LYS (K)464.98%
Methionine MET (M)131.41%
Leucine LEU (L)10511.36%
Asparagine ASN (N)475.09%
Glutamine GLN (Q)272.92%
Proline PRO (P)444.76%
Serine SER (S)879.42%
Arginine ARG (R)434.65%
Threonine THR (T)515.52%
Tryptophan TRP (W)90.97%
Valine VAL (V)596.39%
Tyrosine TYR (Y)414.44%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC4647
HydrogenH7266
NitrogenN1212
OxygenO1412
SulphurS32

FormulaC4647H7266N1212O1412S32
Total Number of Atoms:14569


Total number of positively charged residues (ARG + LYS):89
Total number of negatively charged residues (ASP + GLU):117
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    111715
Absorption 0.1% (=1 g/l)    1.077,   assuming all pairs of CYS residues form cystines

Ext. coefficient    110590
Absorption 0.1% (=1 g/l)    1.066,   assuming all CYS residues are reduced
Aromaticity:0.096

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 39.18

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[34.20, 25.22, 24.13]

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:94.1882
Grand average of hydropathicity (GRAVY):-0.17