Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4305
Number of amino acids:919
Molecular Weight:101006.24 Da
Theoretical pI:5.67


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)768.27%
Cysteine CYS (C)222.39%
Glutamic Acid GLU (E)505.44%
Aspartic Acid ASP (D)434.68%
Glycine GLY (G)9410.23%
Phynylalanine PHE (F)374.03%
Isoleucine ILE (I)465.01%
Histidine HIS (H)181.96%
Lysine LYS (K)414.46%
Methionine MET (M)171.85%
Leucine LEU (L)788.49%
Asparagine ASN (N)374.03%
Glutamine GLN (Q)333.59%
Proline PRO (P)485.22%
Serine SER (S)727.83%
Arginine ARG (R)363.92%
Threonine THR (T)505.44%
Tryptophan TRP (W)283.05%
Valine VAL (V)525.66%
Tyrosine TYR (Y)414.46%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC4542
HydrogenH6888
NitrogenN1202
OxygenO1339
SulphurS39

FormulaC4542H6888N1202O1339S39
Total Number of Atoms:14010


Total number of positively charged residues (ARG + LYS):77
Total number of negatively charged residues (ASP + GLU):93
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    216465
Absorption 0.1% (=1 g/l)    2.143,   assuming all pairs of CYS residues form cystines

Ext. coefficient    215090
Absorption 0.1% (=1 g/l)    2.129,   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 : 38.20

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.69, 27.31, 24.05]

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:77.3014
Grand average of hydropathicity (GRAVY):-0.20