Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4175
Number of amino acids:436
Molecular Weight:48000.26 Da
Theoretical pI:5.85


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)368.26%
Cysteine CYS (C)92.06%
Glutamic Acid GLU (E)153.44%
Aspartic Acid ASP (D)358.03%
Glycine GLY (G)4710.78%
Phynylalanine PHE (F)153.44%
Isoleucine ILE (I)153.44%
Histidine HIS (H)122.75%
Lysine LYS (K)255.73%
Methionine MET (M)102.29%
Leucine LEU (L)347.8%
Asparagine ASN (N)184.13%
Glutamine GLN (Q)194.36%
Proline PRO (P)194.36%
Serine SER (S)225.05%
Arginine ARG (R)173.9%
Threonine THR (T)204.59%
Tryptophan TRP (W)153.44%
Valine VAL (V)388.72%
Tyrosine TYR (Y)153.44%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2145
HydrogenH3270
NitrogenN588
OxygenO631
SulphurS19

FormulaC2145H3270N588O631S19
Total Number of Atoms:6653


Total number of positively charged residues (ARG + LYS):42
Total number of negatively charged residues (ASP + GLU):50
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    105350
Absorption 0.1% (=1 g/l)    2.195,   assuming all pairs of CYS residues form cystines

Ext. coefficient    104850
Absorption 0.1% (=1 g/l)    2.184,   assuming all CYS residues are reduced
Aromaticity:0.103

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 23.24

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.28, 24.31, 21.79]

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:77.3624
Grand average of hydropathicity (GRAVY):-0.29