Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4090
Number of amino acids:929
Molecular Weight:100989.68 Da
Theoretical pI:8.11


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)677.21%
Cysteine CYS (C)121.29%
Glutamic Acid GLU (E)515.49%
Aspartic Acid ASP (D)545.81%
Glycine GLY (G)525.6%
Phynylalanine PHE (F)272.91%
Isoleucine ILE (I)343.66%
Histidine HIS (H)181.94%
Lysine LYS (K)697.43%
Methionine MET (M)283.01%
Leucine LEU (L)10010.76%
Asparagine ASN (N)475.06%
Glutamine GLN (Q)373.98%
Proline PRO (P)828.83%
Serine SER (S)9310.01%
Arginine ARG (R)394.2%
Threonine THR (T)414.41%
Tryptophan TRP (W)50.54%
Valine VAL (V)657%
Tyrosine TYR (Y)80.86%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC4433
HydrogenH7182
NitrogenN1240
OxygenO1366
SulphurS40

FormulaC4433H7182N1240O1366S40
Total Number of Atoms:14261


Total number of positively charged residues (ARG + LYS):108
Total number of negatively charged residues (ASP + GLU):105
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    40170
Absorption 0.1% (=1 g/l)    0.398,   assuming all pairs of CYS residues form cystines

Ext. coefficient    39420
Absorption 0.1% (=1 g/l)    0.390,   assuming all CYS residues are reduced
Aromaticity:0.043

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 49.17

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[25.73, 29.49, 26.48]

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:83.7569
Grand average of hydropathicity (GRAVY):-0.38